Hey ya'll! This idea had been fiddling around in my mind lately, and I just needed to get it down on paper! (or text? Computer? Whatever!)

I haven't seen really any fanfics branching this topic, so I'm happy that I may actually have a pretty original idea! Or maybe not. Maybe people just didn't write it down or something...

Also, things will be slightly different in both the Teen Titans universe and the Young Justice universe. Once again, this takes place after season one of both Young Justice and Teen Titans, and I was forced to change things a little in order to make everything make at least some sense. (Basically, all things that happened in season one of Young Justice is cannon, as it had happened before the Titans. So, everything in the Teen Titans universe is a bit meased up.)

Chapter 1: Unexpected Calling Card

The glimmering of the rising sun danced across the eastern sky, chasing away the darkness the night before brought. Rays of light glittered on the ocean water. The ocean was so still it looked like glass, that one touch would break the entire surface.

As the sun rose higher it illuminated the small island off the coast of the, normally peaceful, city nearby. The giant letter 'T' covered most of the island, the glass panelling on the outside reflecting the sun's rays back to the ocean water below.

Then the city began to finally wake up. What was once a miniscule amount of people and cars turned into a massive flock as night turned fully into morning. People filed out of buildings and houses, ready for another day of hard work. But through all of this bustling, only one of the residents of the Tower was awake to fully appreciate the morning in all of its elegance.

He sat at the edge, legs swinging back and forth at a rhythmic pace as he watched the sun rise over his city. A calm that he rarely felt swept over him as he observed the waking city, and for the first time in a long time, he felt truly at peace with the world around him.

There were no shouts, screams, gunshots, maniacal laughter, obnoxious laughter, or sirens of any kind. The only sounds were that of Jump City and the slight breeze that now blew through the air, disturbing the once still water.

He let out a large, content sigh, his eyes fluttering close behind his domino mask and a smile playing on his lips.

It felt good to finally have a moment of peace in his chaotic, superhero lifestyle.

But, sadly, like all good things, his peace must end. He did, after all, have a team to train and lead through the day if there was any crime that dared to take place in the Titans' city.

Somberly he picked himself up from off the edge and made his way to the door leading back down into the letter-shaped tower. As he decended, the teen took note of how quite it still was. Which, delightfully for him, meant no one had awaken yet.

Or, the two noisier occupants of the Tower were still sleeping soundly. Either one, Robin couldn't complain.

It wasn't that the ebony loathed the changling or elder teen. He just wished that this rare moment of peace could last longer than it had. And with Cyborg and Beast Boy, that was nearly impossible.

Robin stepped into the elevator, making his way to the kitchen and mission room. The annoying elevator music put a small damper on his mood, but overall, he was still more content than he had been in a while.

Honestly, he didn't know why Cyborg kept insisting they install that infernal tune.

He shook that thought off as the elevator let out a 'ding', the metal doors sliding open to reveal a large space occupied by kitchen supplies, a massive television, a computer, a long, green couch, and a few other additions to make the space feel more 'homey'.

Robin strode into the room with a small bounce in his step as he made his way to the small kitchen. Grabbing a coffee mug, he pressed the button on the coffee machine and waited as it prepared what he oh-so-graciously dubbed 'brown energy juice'.

He took this moment to further observe the room, and was a bit suprised to find a floating, cloak covered girl hovering above the coach. Her hood was down, and she was muttering silent words under her breath in a hypnotic metitation.

"Oh, hey Raven, good morning." Robin said cheerfully to the pale teen. She looked back at him for a moment, uttering a small 'good morning', before going right back to her meditating.

The ebony rolled his eyes slightly at her, then went back to watching as the mug filled up with the brown, almost pure black liquid. Finally, with a small noise to signify it had finished, he pulled the mug away before bringing it to his lips and taking a large gulp. He hummed in satisfaction as the taste.

The boy was almost always berated about putting creamer in the coffee, but he always refused. He preferred the pure, tart yet sweet taste of the coffee.

Holding his mug he left the kitchen and instead made his way over to the computer in the middle of the room. Raven still floated beside him, but they didn't acknowledge each other as Robin sat down on the couch and started looking through various things on the high tech device.

The first thing he looked through was the most recent news for the day. A leader of crime fighters always has to be alert and on the watch for suspicious activity, after all.

After finding nothing of importance, he moved on to see if any of the other Titans had contacted the tower. Seeing nothing from the other groups, he was about to close out of the window, when a new message popped up. Thinking it may have been some sort of trouble, as it was only labelled 'Titans', he clicked on it. As he waited for it to load, he took another sip of his coffee.

But, when whatever message it was did appear, and Robin glanced at the screen, he almost spit out his coffee in suprise. His eyes widened and he choked back his coffee, forcing himself to swallow, and looked back at the screen, bewildered beyond belief.

Raven peeked her eyes open for a brief moment to see Robins bewildered expression, then went back to meditating. All the while trying to supress a smirk at her leaders reaction.

On the screen, instead of a report or some sort of letter, was a video call. And who he saw on the other side made him stare with utter shock.

On the screen displayed his old team that he worked with while he was still Batman's partner. All of them had varying expressions of happiness as they saw there friend for the first time in almost two years.

"Hello, my friend, it is delightful to see you once again." Kaldur, who seemed to always be the one to break the silence, announced with a smile adorning his face.

Robin had yet to snap out of his stupor, so he could only mutter a small 'you too'. Although, to them it sounded more like a question.

But, after all, who could blame his utter shock. Standing before him was the team he had abandoned, including Artemis, Wally, Connor, M'gann, Kaldur, Zatanna, and Rocket. There were some people he didn't work with before, but had heard joined the team, such as Lagoon Boy and Wonder Girl.

No one said a word as they stared at each other in awkward silence as they all waited for the Boy Wonder to get out of his shock. But that seemed like an almost impossible feat.

Thousands of thoughts swarmed his mind, and it took all of his focus just to keep from looking more like an idiot than he already was.

It was almost a whole minute later that the ebony finally understood the situation, and his usual stoic expression, along with some slight anger, returned and he addressed the other teens on the screen.

"Why did you call?" he asked in a sharp tone, catching most of the teens off guard.

The original team members remembered a snarky, energetic kid who loved to goof around and almost always had a smile on his face, no matter the situation. This teen was definetely not that same person they grew to love.

"You're starting to act like you actually don't want to see us." Artemis stated with a bit of venom and sass. Robin simply glared at her, catching the teens off guard once again with his sharp and annoyed glare.

"To be perfectly honest, no, I'm not excited to see all of you. Happy, sure. But I'm more curious as to why you called. I have other business, you know." Robin replied, crossing his arms with a huff.

Lagoon Boy and Wonder Girl stood awkwardly to the side, not exactly sure what to do in the situation. So, with a small little nod to each other, they slunk their way out of the room to leave the others to talk with the Boy Wonder.

"Oh yeah, what 'other business?'" Connor asked gruffly.

But just as he was about to refute with his reason, he could hear two obnoxiously loud voices from the elevator. All he did was sigh and pinch the bridge of his nose, confusing the other team who couldn't hear anything.

Those two always picked just the right time to barge into a room, don't they? Note the sarcasm.

The elevator 'dinged' and immediately afterwards, the two friends strolled into the room, arguing. From the viewpoint of the Young Justice team, they could see a small green boy and a large half-robotic man who were basically screaming at each other.

"C'mon BB, we need some meat protein!" Cyborg exclaimed, throwing his hands into the air to emphasize his point. Beast Boy just stepped in front of him, an accusing finger pointed right at his chest.

"Now way! You do realize I have been all of those animals, right!? That's basically cannibalism!" the changling screeched right back.

"Would you two quiet down!?" Robin snapped, glaring at them over his shoulder, gaining the attention of the two who just entered the large room.

Beast Boy was about to counter, but then he caught sight of the computer screen. His eyes widened in amazement, and a large smile spread across his face. It would have made even Cheshire's mask jealous.

"Woah! It's you guys!" he exclaimed, abandoning Cyborg in favor of the team on the computer. He draped himself over the couch beside Robin, a glittering amusement in his eyes.

The team, on the other hand, only watched with mixed reactions. Some seamed flattered (Zatanna and M'gann), others seamed amused (Kaldur, Wally, and Rocket), and the rest were just annoyed by the green changling (Connor and Artemis).

"Beast Boy, be quiet, I am trying to meditate." Raven said in her monotone voice, not even opening her eyes. Beast Boy just scoffed.

"C'mon Rae! Do you even see who is on the computer right now?!" he screamed, flailing his arms. Raven simply sighed and teleported away. But Beast Boy took no note of this as he continued to stare at the heros in front of him.

"Can you please just go eat something with Cyborg?" Robin pleaded, placing a firm hand on the youngers shoulder. Beast Boy only shook his head.

"No way Rob! It's been forever since I've seen these guys!" at this, everyone who heard rose an eyebrow, even Robin.

"What does that mean?" M'gann asked carefully. Beast Boy only blushed out of embarrassment. Robin narrowed his eyes at the changling. He was acting very suspicious, and that isn't normally who he is.

"U-um, nothing! Just-just saw you on TV a w-while ago and haven't heard anything since!" he stuttered, rubbing the back of his neck sheepishly, not making eye contact with anyone.

Robin was definitely going to probe the boy for answers later. Especially since the team was covert and wasn't ever shown publicly. But for now, there was more important business to attend to.

Taking a deep breath, Robin faced the team once again, determined to get this over. And quickly.

"Back to my original question. Why did you call?" his voice was a bit softer this time, and the Young Justice team was grateful Robin didn't seem to entirely hate them.

"We are tracking an enemy, but we cannot seem to capture them. They seem to be always one step ahead of us. And we heard that the Titans have dealt with them quite well in the past." Kaldur said, getting straight into serious business.

"So you want our help?"

"Cool! We can totally help you!"

"Beast Boy, that hasn't been-"

"It'll be so awesome!"

"Beast Boy!" Robin said in a commanding tone, gaining the changling attention. He had a stern look on his face, and Beast Boy let out a sheepish laugh.

"That is, of course, if our leader says we can." he added quietly, but still had pleading eyes. Behind his mask Robin rolled his eyes, and looked back to the other team on the screen.

"First we need to know who it is, then I'll decide." Robin said after a moment of thought. The Young Justice team let out an almost collective breath that they didn't realize they had been holding.

"We are not sure exactly of the Titans history with him, but we have been told he is a worthy adversary by the League." Kaldur continued, explaining the situation as best he could. "But, if I may ask, why is there such minimal information on the Titans and Slade?"

At the last words, the whole room became tense. Even Cyborg, who had been preparing himself a breakfast, not really in tune to the conversation, stopped what he was doing at the mention of that retched name. Beast Boy's eyes widened in fear, and he hesitantly looked back to Robin, sliding down the couch slightly so only his head was visible.

Robin, on the other hand, was trying his best to control himself. His hands clenched into fists, his knuckles turning white at the thought of that man. His jaw clenched in fury, and he had to close his eyes as he remembered his days as the man's unwilling apprentice.

That time in his life scarred him. He still had nightmares, where Slade would mentally torture him until he completely lost his mind and joined the man in his killing spree. And even though it happened nearly two months ago, just the mere thought of what he was forced to do sent chills down his spine. He would rather die than experience that kind of torture again.

"Rob? You okay, dude?" Wally's voice asked through the computer, worry seeping into his voice. After a moment of tense and worried silence, Robin finally calmed down enough to answer without freaking out.

"No." he ground out, wrenching his eyes open and away from the images of his forced apprenticeship.

"What's wrong?" Zatanna asked, and it somewhat suprised Robin that she, of all his previous teammates, was the one to ask. And it seemed as if she actually cared, too.

She was always a good actor.

"We are not helping you catch that man." Beast Boy was about to rebute, but one very harsh glare from the Boy Wonder shut his mouth. He sunk back behind the couch more in fear, to the point where only his terrified green eyes were visible. "And that's. Final."

With this Robin angrily stalked towards the elevator, not bothering to shut the communication down. He grabbed his mug and took a quick sip, thinking it may soothe his growing nerves. All it really did was make him even more livid.

"Yo, you don't have to-" Cyborg began sympathetically, but was cut off as a mug was sent straight for his head. He managed to duck just in time, but the contents spilled over his body, making some of his parts spark. He looked over at Robin in slight shock and anger. "Not cool man!"

The ebony said nothing as he silently walked into the elevator and closed the doors, disappearing to somewhere else in the tower.

The team on the screen just watched in stunned silence as they watched their previous teammate walk away from them. This left Beast Boy and a now slightly sparking Cyborg to try to clarify the situation.

"Why did Robin react so violently?" M'gann asked, her shock and worry very evident in her voice. Beast Boy's pointed ears perked up and he leaped over the back of the couch to where the Boy Wonder had previously been sitting.

"Well, a couple of months ago Slade-" the changling began, but was quickly cut off as a large hand was placed over his mouth by a panicked Cyborg.

"That's not our story to tell, BB. Just leave it be for now." he said softly, the changling huffing and pushing his hand away with a simple 'fine'.

"May I ask who you are?" Kaldur inquired, and the two teens realized they had momentarily forgot that they had never met these people before in their lives. In fact, they didn't even know Robin was apart of another team before the Titans.

Well, one of them was, but he was determined to keep that information a secret.

"Name's Cyborg, the Titans second in command if anything happens to Rob. And I'm guessing you already know Beast Boy."

"It is delightful to meet you, Cyborg. But, I believe we would all like an explaination for Robins sudden behavior-"

"Yeah! Rob's never acted like that before! What's up with him and this Slade guy?" Wally interupted, earning him a slight slap on the back of the head from Artemis. Cyborg simply sighed and sat down beside Beast Boy.

"I don't think Robin would appreciate it if I told you guys, so you'll just have to get it out of him some other time. But for now, I'll just say there is a reason there isn't a lot of public news on Slade. And Robin would like to keep it that way." he stated grimly, looking at the teams dissapointed faces in guilt.

"Those two have bad history, huh?" Rocket asked softly, and Beast Boy nodded.

"Worse than bad." he stated, looking over to Cyborg with a pitied glance, in which the elder returned.

"I do hope Robin changes his mind about lending your assistance. It could be quite helpful." at Kaldur's words, Cyborg gave a sly smirk.

"Don't worry, we'll be helping you, whether Robin likes it or not. After all, heros need each other sometimes, don't they?"

With Cyborgs proclamation, Kaldur gave a small smile.

"Yes, indeed they do." the communications cut off, and both of the teens leaned back into the couch with sigh. Both were thinking along the same lines as they glanced at each other.

How in the world were they going to convince Robin to work with Young Justice?