A prompt from thebestoftherest, who deserves credit for this idea.
Some how the helmet of fate breaks, thus somehow merging Wally and Zee mind, but not Kal because his powers are protecting him, making a new Doctor fate, while Zee, Wally, and Nabu are in charge.
That was all it took. One mistake. Zatanna knew it was her fault. Oh well, at least the League wouldn't have to use the helmet like it was the last resort in a never ending all out war against evil.
Kaldur saw it, Wally had dashed over to Zatanna when Fate's helmet had been magically appeared in her hands and placed his hand on it, appearing to be trying to stop her, Kaldur too had dashed over to see if he could stop the girl. But even then, they were too late.
Klarion saw them. "Yortsed eht temleh!" (Destroy the helmet!)
A blast of black lightening rained down from the sky. The lightening hit the helmet and bounced off, Zatanna and Wally were, but Kaldur was using his powers of lightening generation to absorb the rebounded attack. The screams of his teammates filled the air mixing with an explosion of gold light. The shadows of his friends were merging together, being somewhat of a disturbing sight.
As the blinding flash cleared while the rest of the team, and the teams mentors who Robin called in as backup, ran into the large clearing just after Klarion, being the coward he was, took off in a hurry.
Robin, being trained by Batman, was the first to notice something was wrong when he didn't see Zatanna or Kid. Zatara and Flash, upon noticing the absence of their respective family member's, began freaking out.
"Kid! Wally! Where are you?" Flash began running all over the clearing when there wasn't an answer.
"Zatanna!" Zatara screeched, casting spells left and right in a frenzy.
"Kal," Robin spoke up "what happened?"
All eyes, even the masked eyes of Flash who had returned to the clearing, turned to the young Atlantian.
Kaldur took a deep breath, gathering his thoughts "I am sorry to report that Klarion escaped. Zatanna had summoned Fate's helmet as a last resort to this battle. Kid Flash had ran to her in an attempt to stop her from placing the helmet on her head, at which time I too ran over to convince her there was another way. Unfortunately, Klarion saw what was being planned.
"He then fired a blast of black lightening at the helmet. I used my lightening generation abilities, in an attempt to make the lightening less severe for the both of them, but sadly, along with the destruction of the helmet, they were.." Kaldur took a breath and then exhaled "I am deeply sorry.."
Zatara and Flash became silent. Robin's attention was caught by something.
"Fate?"
Zatara and Flash turned to look at Fate. Fate's hair was a dark red and the eyes of the deity were the perfect mixture of blue and green. Fate's typical regalia, the leotard-looking blue piece to the uniform, the gold pieces, the armor, the gloves, the helmet itself, it was all too ominous.
"Their souls.." Zatara whispered "Zatanna's and Wally's souls have merged with Dr. Fate!"
"What!?" Flash yelled.
"Your diagnostic is correct, Mage." If no one believed Zatara about their souls being merged before, hearing the three voices overlapping as Fate spoke, that confirmed it.
"So," Flash began "now what?"
"The boy and girl belong to Fate." The self-proclaimed lord of Order said "Their bodies have been destroyed, their minds and souls are active, they willingly accepted the pull of Fate's energy."
As the team and league were processing the information, Fate was slowly floating upwards. Zatara and Flash were the only two to react. They each grabbed one of Fate's wrists. Flash grabbed the left, and that eye turned green.
Zatara grabbed the right, and that eye turned blue. Fate would make them let go. The eyes became the beautiful blue-green mixture again. With a forceful tug, the two were forced to let go, and Fate was floating upwards again.
"Leave Chaos to the Fate."
Creating that symbolic ankh, a portal to the Tower of Fate, before flying into it and disappearing.
Once again, special thanks to thebestoftherest for this marvelous idea.