July 10th, 2016. Metropolis.

Within a moderately sized, Urban area, sounds of soft, snoring could be heard, just within the green area of a park within Metropolis, A teenage male of Hispanic heritage seemed to be casually resting, red jacket and trademark goggles the most noticeable and apparent traits caught by him. Children walking along and noticing him without saying a word, he seemed to be slightly troubled, twitching and sneering in his sleep, most likely suffering from a nightmare of some sorts.

Within Rex's mind came the memories that lead to this.

{"BREACH! After everything I've done...Everything we've been through. You do this?"}

{"..It was good seeing you again, Rex. Good thing Breach here had me secured in her pocket dimension after the Nanite curing you caused over ours...Now, speaking of dimensions. I have nothing left to thrive for in this one, its rather dull now don't you think? I can expand my horizons, Time to take a leap of fate and see where we go"}

{"I WON'T LET YOU!"}

At the Watchtower.

"..." Stern eyes narrowed through a mask, monitoring over the planet from their satellite HQ, Fingers working upon a laptop device as it happened. "Not sure what to make of this" A deep, serious tone spoke out, rubbing underneath his chin and looking backwards at the fellow Justice League member, Wonder Woman, who raised an eyebrow at Batman. "Well? What is it?" She asked, Batman clicking a button and revealing awkward bio-spike activity in Metropolis, within a single point.

"Well, if you recall, The Light, Vandal Savage and Lex Luthor specifically had a new, mysterious member join their midst in the past few weeks" Batman reminded her as she shook her head yes, "Right, The fellow by the name of Van Kleiss? The guy who walks around with those freaks beside him correct?" Van Kleiss came into contact with The Team once before, during one of Vandal Savage's antics. Claiming that he was a new member. His underlings, Biowolf, Skalamander and Breach proved a challenge while Kleiss and Savage themselves watched on.

"Correct"

"So what? Is Van Kleiss in Metropolis then?" She asked, Batman shook his head. "No. But a bio signature very similar to his is, a signature similar to his underlings as well, During the scuffle with them, Tim managed to retrieve a blood sample from Skalamander, revealing these tiny micromachines in his his body, like nano-machines. There was many of them inside the sample. This signature matches what the other 4 give off, So I'm going to call the team to send a squad to see what that is" Batman explained, Wonder Woman nodding. "Right Awa-" Tim Drake appeared, eavesdropping and falling down from the ceiling.

"I hear ya loud and clear, Batman" Tim said, smirking as Batman gave him a stony expression.

"...Right...Robin"

Back at Metropolis.

Aqualad had send out Blue Beetle, Wonder Girl, Miss Martian and The New Kid Flash, Impulse towards the location. The three of them flying on air while Kid Flash himself ran on land.

"So you mean to tell me that crazy guy, Van Kleiss has more people on his side now? Dios Mio that's not good at all" Blue Beetle said, huffing as Miss Martian nodded. "Its possible, only four bio signatures match them and those nano machines...So be on guard" M'gann said as they all zoomed towards the area.

Minutes later, they all arrived near the urban area. Looking around and taking out a device to find the bio-signature, It began to beep to indicate a match, pointing directly at a sleeping teen underneath a tree. Causing the four of them to raise their eyebrows. "Him?" Wonder Girl asked as Miss Martian motioned forward, eyes glowing green as she began to harmlessly inspect his inner mind, however this jolted the Nanites from within Rex, causing the now 17 year old's eyes to open in surprise, flipping upwards and becoming frantic. "AUGH, VAN KLEISS, BREACH! I'M GONNA- Huh?" Rex blinked, looking around.

"...Where am I?" He wondered, looking up and seeing a gate saying the large words "METROPOLIS" on it. "Never heard of it" He added, rubbing his head in slight irritation as the team looked at him.

"Hear that? He said Van Kleiss's name" Wonder Girl said, narrowing her eyes as Blue Beetle tilted his head a bit. "He sounded angry with him though, how should we take that?" He said, Kid Flash nodding in agreement. "He still might be dangerous though"

"Uhm...Hello? Dangerous? Earth to weirdly dressed cosplayers, Rex Salazar. You know, Providence's secret weapon, greatest hero in the world? Generator Rex? Yeah?" He bragged off a bit as the four blinked in confusion.

"...No?, Well..Whatever, what's this about me being dangerous? And how do you know Van Kleiss? You guys don't look normal. And I'm in an awful mood, so can you just work with me here?" Rex asked, Miss Martian shaking her head.

"We should be asking you that...Uh, Rex. How you know Van Kleiss. Also why you give off the same bio readings as him"

"Oh! Probably because we're both E.V.O's." Rex responded, picking at his ear.

"E.V.O's!?" The four asked in unison.

"Exponentially...Varied...Organisms...I think?" Rex tried to explain what the acronym meant...He came close at least.

"Well, Regardless, we gotta take you in and out of Metropolis. We don't know what you are or your hazard regarding the relation to Van Kleiss, if you understand, Ese" Blue Beetle said.

"Well...Hermano, I just said I'm no danger to anyone. And I'm in a pretty bad mood, I don't need a bunch of-" Rex's eyes narrowed for a split second, realizing and remembering what happened before he passed out..He went into Breach's portal.

..Did she..Manipulate time again? Was Rex sent back into the past? Are these E.V.O's?

"...You guys...You might be E.V.O's" Rex said, jumping backwards a bit and showing hostility.

"Whoa, whoa whoa there buddy, We don't wanna hurt you" Bart implied.

Rex's arms began to blow with biometric patterns before it mutated and morphed, conjuring up what seemed to be a large, orange, mechanical sword from his arm, readying it for battle. "Try me"