Other Titles: Legacy of Justice, Legacy of the Dark Knight, or Maelstrom Hero

Summary: The Future is always changing by one or more actions. One action has changed a lot. One who saw what happens when going down the path for the sake of the mission and didn't like it.

By his actions, the future has change better for him and a good number of others around him which he lives a good life years later in the future. He is happy and likes to keep it that way.

Rated M for Mature

Crossover: DCAU/Batman Beyond mix with DC Comics, Naruto, and small others like characters from Marvel & My Hero.

Inspired by: Little of Batman the Brave and the Bold Ep Knights of Tomorrow, Baby Makes Three (LOTSlover & their work), Batman in Bethlehem comic series, Chains of Favor (HawkAngel XD) and few others

Notes: AU with time/dates tweaked out, Some OOC Characters, OCs, OOC/A little OP Naruto, and I don't own anything.

...

Chapter 1 New Start to New Duo

Wayne Manor

Batcave

In Wayne Manor, down below and pass the study had the Batcave on and saw a well-built man for his age taking deep breathing. He had black hair with some white streaks coming to his sides and blue eyes, having a muscle build of a boxer and trained soldier. He looked good for a guy his age but had a problem he powering through, a heart attack he had during his patrol. This was Bruce Wayne, CEO of Wayne Enterprise and Gotham's well-respected man, but at night Gotham's hero and founding member of the Justice League, Batman.

Bruce had come back from a night of patrol which was a mistake but didn't regret it and hold it against him. He dealt with punks to thugs to gangs and hostages rescuer but this was one was a little different as he had a heart scare during his patrol. Lucky, he had saved the hostage and beat the thugs down before the heart attack but could he keep it up?

A good questuion which the old bat knows the answer too.

Bruce coughed a few times as he took a pill for his heart, a special one to slow his aging and heal his inner organs. A gift that his friend Clark made as a wedding gift. Yeah, he is married and would be explained later.

Bruce's heart calm down and took calm breaths in relief. The pill's magic did its trick and now was helping a lot. He then put the bottle down and started taking his bat suit off, knowing what's happening and what he must do.

"You seem trouble Master Bruce," An elder and a father-like voice spoke, getting Bruce's attention to look at who was with him in the cave, surprisingly a black/white cat.

"A little Alfred, a little. The suit put to much strain on my heart, a bit too much then I thought," Bruce said as he finished putting his suit away and wore more relaxing clothes for the night.

"I would put that on the list sir," Alfred said.

And yes this cat is Alfred Pennyworth or known as Alfred the Cat who has the original's memories. The butler had passed away a year ago due to old age and lung cancer which sadden the whole family and took a while to mourn. Then surprising the cat started speaking and sounding like the butler himself which the said cat explained that he was a special cat given a program called the Penny Program and help the family out.

Bruce then took his suit and hang it out with the other suits that are in the glass case for display. Staring from some old Bat suits that Bruce keeps to learn from it and build new suits that are better armored, Robin suits that his wards used before changing their code names, Two Batgirl suits, Spoiler, and the last one for the black tech suit to be placed at.

As Bruce placed the suit in, he remembered a lot of good and bad he had done and outcomes around him as the Dark Knight. A good number of them are worth remembering and some were not. He sighed as he placed the suit fully in and get started on the next part of his life, retiring and fully start in fatherhood.

Yes, he is not only married but is also a father to a good number of adopted sons yes but also children of the women he loves.

It was hard to retire, yes it was but it had to be done.

Bruce then started to walk upstairs with Alfred following behind and enter the study room. He had an idea who would be the next Batman but would do it tomorrow as it was late and needs some rest.

"I have some tea ready to help you relax sir," Alfred informed as he walks past his master.

"Thank you, Alfred," Bruce said.

"Should I call Master Dick?" The cat asked.

Bruce shook his head and said, "Not tonight, I would call him once things calm down and a special birthday surprise for one my little girls."

Alfred smiled at that and agreed.

"Will do sir," Alfred said.

Bruce smiled and felt a scene of peace to coming to him as he knows that retiring would change him but not as much as he is of course still Batman. He would admit that having wives and kids have brought a great impact on him that he is happy with. Now he is going to enjoy more of that impact but first sleep and birthday party to set up for one of his princesses.

It's a great life and something to enjoy

Time Skip-Years Later

Years later we see a new Dark Knight flying in and landed on the rooftop. The suit was an advanced suit designed with flexible plates overlaying an MR-fluid (magnetorheological fluid) armor layer and incorporating the latest in cutting-edge technology. Black cape and cowl shaped like bat wings and bat pointed ears. This was Damian Wayne, the current holder of the mantle of Batman, who stood on the rooftop of Wayne Enterprises. (Batman suit from the Arkham Knight game with tweaks added to it and would be shown at the button of the story for more information)

It has been some time since Damian took the mantle. His father gave it to Dick Grayson but at some point, he gave it to his younger brother. He didn't want to be Batman but he did the cowl justice during his reign but he felt that the legacy of the cowl should be given to someone more likely to handle the darkness behind it.

So Damian is now proud to wear the cowl.

It is what he's been trained for. To be the thing that goes bumping in the night. His father was at first concerned given that Damian is known for his more...aggressive behavior rivaling that of his adoptive brother, Jason Todd. While Damian would agree that he's certainly not above being more brutal in his methods, he vowed to never kill like his father.

Now here he is, waiting for his partner.

"You're late," He said to the figure behind him in the shadows

"Seriously? It was not even a minute," The figure said as he revealed himself as a blond-haired teen wearing an advanced upgraded Robin suit.

This was Nathaniel Wayne, another adoptive son of Bruce Wayne. Bruce raised the boy because he saw that Nathan was like him. An orphan lost with no direction and possibly no future.

Unlike Bruce, Nathan maintained his idealistic outlook on life. While Bruce helped him become the man he is today, Nathan also changed Bruce. Made him more...human. Not an easy task but Nathan often saw the good in people and did his best to prove it. It could be said that the Batfamily is stronger than it has ever been because of Nathan. Though Nathan believes he's no one in comparison to the rest of his new family.

Regardless, he became a vigilante to help people just like them. He never once complained or regretted this. Not once. Which is why he's here with his partner.

"A minute makes a difference, Robin," Batman said.

"It's Red Robin, Bats" Red Robin corrected.

"Got the Intel?" Batman asked to change the topic.

"Yep. Apparently the Neo Jokerz are going to rob Melissa Sionis' shipment crates near Gotham Pier. She's bringing in high-grade weapons and they want them. It's going to be a bloodbath." Red Robin explained

"That's not going to happen. Let's move" Batman said as he jumps off the roof and activates his feet thrusters to fly to the destination.

Red Robin sighs.

"I hate it when he does that" Red Robin said as he does the same and follows Batman.

With that, a new duo of Gotham, Batman & Red Robin flies into the night and ready to take down the scum that hides in their city that their father fight and now it's their trun. And not just them but also others and this Bat-family is one big family. A living legacy in the making.

...

Information:

Damian's Batman suit: An advanced suit designed with flexible plates overlaying an MR-fluid (magnetorheological fluid) armor layer, and incorporating the latest in cutting-edge technology.

The tri-weave bodysuit consists of an outer and inner layer made from a titanium-dipped tri-weave fiber mesh. Sandwiched in between is the MR-fluid based liquid armor system. The proprietary WayneTech Smart MR-fluid hardens in response to impacts, specifically designed to provide superior shock absorption, as well as enabling greater force delivery behind counterattacks. The liquid body armor layer is also more flexible than the ceramic or fiber-based alternatives used in previous suits, allowing for greater maneuverability and faster elimination of multiple targets in quick succession (Fear Takedowns). The suit's subsystems are symbiotically integrated with the Batmobile and provide a quick launch capability via the vehicle's electromagnetic ejection system (analogous to launch from a railgun). Designed to withstand up to 6gs of acceleration, the suit increases navigational capability by tolerating high acceleration maneuvers without risk of injury (vis-a-vis gliding, grapnel boosting, and high-speed ejection from the Batmobile).

In addition, the Batsuit v8.03 incorporates the aforementioned holographic projector, as well as the ability to remotely control the Batmobile using haptic controls that are mounted on the gauntlets. The gauntlets themselves possess retractable blades and sensors that worked in conjunction with Detective Mode to analyze foreign samples and upload data to remote sites.

While the new suit was high tech in nature and offered Batman his full mobility this suit, however, was only moderately effective against bullets. While the actual plates could easily stop bullets(as demonstrated by Gordon and Batman at the end of the game) in between the plates was were the weakness of this armor was, as demonstrated by The Arkham Knight as the liquid armor layer was highly effective against impact, but only offered moderate protection from bullets, especially at point-blank range. However if shot the suit was designed to compress around the wound and stop the bleeding, as revealed by Robin in an optional conversation.

Note: Magnetorheological (MR) fluids are 1 of 2 types of liquid body armor currently under development in real-life; the other being shear-thickening fluids (STF) (aka Dilatants - a class of non-Newtonian fluid). More about liquid armor here:

In the case of the Batsuit v8.03, the WayneTech Smart MR-fluid layer most likely consists of iron nanoparticles suspended in an oily liquid. Under normal conditions, the armor remains flexible, but when an electrical current is applied to circuits running throughout the armor, the resulting magnetic fields re-align the iron particles and hardens to protect the user from impacts. Interestingly, the Batsuit's liquid armor is stated to harden on impact not via electrical current, a distinct property of dilatants (see above), not MR-fluids. One possibility is that the suit incorporates piezoelectric/piezomagnetic elements that generate transient magnetic fields when stressed.

...

Bio

Nathaniel Wayne

Nicknames/Alias:

Nathan or Nate (By family and friends)

Blondie

Little Bird

Robin

Red

The Boy Wonder

Dynamic Duo (Shared with Batman)

Current Alias: Red Robin

Hair: Blonde

Eyes: Ocean/Sky blue

Age: 18

Family Relatives:

Bruce Wayne (Adopted Father)

Diana Prince (Adopted Mother)

Dick Grayson (Foster Brother)

Jason Todd (Foster Brother)

Tim Drake (Foster Brother)

Damian Wayne (Foster Brother)

Wayne & Amazon (Adopted relatives)

Minato Namikaze (Disowned Father)

Kushan Uzumaki (Disowned Mother)

Mio, Naruko, and Menma (Disowned Siblings)

Powers and Abilities:

Nathan has agility, strength, speed, endurance, and reaction time superior to any Olympic athlete who ever competed.

He is a meta whose ability enhances all of his bodily functions to the peak of human efficiency. Notably, his body eliminates the excessive build-up of fatigue-producing poisons in his muscles, granting him phenomenal endurance.

He is also a master martial artist and is able to learn anything faster than most computers

Equipment:

Red Robin Suit and utility belt

Tumbler (One of old Batmobiles that Nathan toon up and update)

Background:

In the original timeline, Naruto would have been placed in an orphanage that would have abused him and caused him to awaken his metahuman abilities and destroy the whole building. And later placed in a government lab to be used as a weapon against the Justice League. This was Bruce's biggest regret as he was the one that found him and placed him in the orphanage while he could have helped a poor boy that only wanted a true family.

After the trip to the future and beating Chronos, Bruce changed his life around and took Naruto instead of placing him in the orphanage which he found out that his former family had neglected him in favor of brats and allowed the village to abuse him for not having charka. He later with help and agreeing, adopted the young boy which cried in tears of joy and hugged his adopted parents.

Naruto was renamed as Nathaniel and given a far better life he could ever imagine.

...

Pairings:

Bruce (Batman) Harem: Catwoman, Talia al Ghul, Wonder Woman, Hawkgirl, Victoria Vale, Silver St. Cloud, Zatanna, Superwoman, Poison Ivy, and Harley Quinn.

Dick x Barbara

Jason x Artemis

Tim x Stephanie

Damian x Raven

Naruto/Nathan Harem: Ochako Uraraka, Momo Yaoyorozu, Tsuyu Asui, Gwen Stacy (Ghost-Spider), and rest need help/ideas.

Rest TBA

...

List of Bruce's kids: Yeah kids as Bruce has been busy over the years, in more ways than one and here we are...

Dick aka Nightwing and later takes the mantle of Batman who later retired and gives the mantle of the cape and cowl to Damian. The rest would be shown later.

Jason aka Red Hood who has retired and rest would be shown later.

Tim aka Red Robin who has retired and rest would be shown later.

Damian Wayne who is the new Batman (Son of Bruce and Talia)

Naruto/Nathan who becomes Red Robin (Adopted son of Bruce and Diana)

Nickolas Alfred Wayne and Kaia Alexandrea Wayne (Son & daughter of Bruce and Diana)

Helena Wayne (Daughter of Bruce and Selina)

Elizabeth Wayne and Shane Wayne (Daughter & son of Bruce and Shayera)

Charlie Wayne (Son of Bruce and Victoria)

Misty Wayne (Daughter of Bruce and Silver)

Giovanni Wayne and Amelia Wayne (Twins, Son & Daughter of Bruce and Zatanna)

Thomas Wayne Jr (Son of Bruce and Lois of Antimatter Universe)

Harry Wayne (Son of Bruce and Harley)

Rose Wayne (Daughter of Bruce and Pamela)