Disclaimer: I do not own Ben 10 or the Flash

I had this idea that came to mind and for now this is going to be a one shot of what the Flash's origin would be like in the Ben 10 verse. Now this origin will primarily focus on the comics but will also include the power origin from the TV show with the particle accelerator.

I've been thinking about writing some superhero origins from both DC and Marvel on how they could be different in the Ben 10 verse so let me know any heroes or villains you would enjoy seeing me do this for.

Enjoy!

Secret Origins: The Flash

Streets of Central City

"Come on, I can't be late today!" the 15 year old Barry Allen said as he raced towards his high school.

Ever since the strange death of his mother and his father being sent to prison for it Barry had decided to try to prove his father innocent and find the real person responsible for his mother's death.

So he had taken to studying forensics in his free time and knew more about it than some of the guys at the Central City Police department. Detective Joe West was certain that he would be able to get a job at any Forensics lab in the country maybe the world with his talent for it.

But Barry knew that he would stay in Central City, as that was where all the information and evidence was that could free his father was.

However, even with his remarkable intelligence Barry had one major flaw…

He was slow, and as a result he was always late.

And his chemistry teacher had promised to allow him to stay after school and use some knew chemicals the school had gotten in, but if he was late then he would be held back after class and wouldn't get to experiment with the chemicals.

He really wished he was faster.

S.T.A.R. Labs, Central City

"I assure you Magister Tennyson, the particle accelerator is completely safe. We've checked it from top to bottom and implemented every safety measure possible" Doctor Harrison Wells said walking beside Max and Ben Tennyson.

"Still Mr. Wells, anything can happen and mistakes can be mad, accidents can happen and nothing is unbreakable." Max said

"Yeah" Ben said in agreement "Just give me five minutes and I could probably turn this into scrap metal"

"Please don't" Harrison Wells said to the teen hero with an edge to his voice.

Ben narrowed his eyes a bit

"Are you a fan of Will Harangue?" he asked

Harrison chuckled "Please, before you and that fantastic device was revealed to the world I was one of his favorite targets to pick on"

Then he fixed Ben with a meaningful look

"Believe me, Mr. Tennyson, you are destined for great things" he said in a tone that implied he knew a secret that Ben didn't.

"Anyways I have a lot of work to do and as you can see nothing is out of place."

Max took a look around again

"Seems so"

Harrison Wells smiled at the two

"So alls good, the government was worried about this project and asked you to check it out and everything is perfectly fine. So since you're here please stay for the ceremony tonight where we turn this on as my guests" he said before giving one of those all knowing smiles.

"Trust me, tonight is going to change the world in ways you can't imagine"

Central City High School

Barry looked through his journal that held the information he had gathered about strange, unexplainable mysteries. Everything from Area 51 to Keystone City that went missing decades ago.

"ARE YOU SERIOUS?" he heard a girl say to his right.

"Yeah, Ben 10 is here, I heard he's going to be at Star Labs tonight for that thing their doing" another girl said.

Ben Tennyson, of course Barry knew who that was, who didn't? Barry felt like if he had powers like Ben's then he could prove his father's innocence easily.

But that would never happen after all, he was just Barry Allen, the shy nerd who couldn't get up the nerve to talk to another person much less a girl.

Only another hour and he could head over to the chemistry room and be more in his element.

He looked outside at the gathering of dark clouds.

'Looks like there will be a storm later' he thought to himself

Thunder rumbled ominously in the background.

Star Labs

"I'd like to start tonight off by thanking everyone for coming out tonight and for your support. Because what we do today will forever change the world" Harrison Wells said from the stand.

"The aim of tonight's experiment is to essentially study x-energies, in other words energies that previously have been believed to be nothing more than theoretical, and these energies will provide new opportunities for study and potentially limitless energy" he paused for dramatic affect

"So without further review, let's begin"

Central City High Chemistry Lab

Barry ran to the window coughing as he opened the window

"Too much sulfur in that mix" he said to himself

His teacher was out in the hall talking to two other teachers leaving Barry in the room alone.

Smelling the sulfur in the air, Barry stayed at the window enjoying the fresh air and watching the storm outside as the thunder and lightning flashed. From his position he could see the Star labs facility and his inner nerd was geeking out over the science involved in the experiment and everything they could learn.

Tonight could possibly help him discover the truth about that night.

That's when a strange sound caught his attention like a low whining and then…

BOOM!

It was like a wave of light came off of the facility and he heard what he thought was a person screaming.

Then a orange-yellow lightning bolt struck him in his chest.

He had always imagined that if you were struck by lightning then it would happen in an instant but for Barry it was like everything began to slow down.

He could see the lightning bolt hitting him and throwing him back, he could feel the air changing as he slowly went flying back to the air and while he didn't notice it at the time, he couldn't hear anything, simply because he was thinking faster than sound moves.

Then he finally hit a self filled with various chemicals, and after making impact everything returned to normal speed.

He couldn't move and everything was getting darker, but Barry heard the classroom door open and the three teachers came in.

He felt someone shaking him.

"Barry! Barry! Are you ok!" while he could hear his teachers trying to call 911 and feel them shaking him, he couldn't see them, but he was seeing something

He saw what he could only describe as his life flashing before his eyes

He saw his past, his parents taking him on a picnic when he was 5.

The night his mother died in the strange lightning.

Visiting his father in prison.

Talking to Detective West last Saturday while they had lunch.

Everything caught up with him seeing himself get struck by the lightning.

It should have stopped there after all he had seen his life.

But it didn't.

He saw himself in a red jacket with a yellow lightning bolt

He saw himself fighting a man in clothing the opposite of his with red lighting coming off of him.

He saw himself racing someone who he couldn't see except for his red cape and mostly blue clothes.

He saw a glowing green light

And what appeared to be a giant bat.

None of this made sense to Barry as he passed out.

1 month later

Ben walked into the Plumber HQ to ask his Grandfather about anything that he could possibly do.

It had been a little over a month since the particle accelerator exploded and luckily Ben had been there and managed to use Chromastone to shield the attendees against most of the blast while some were hit with debris, none of the injuries were serious other than Harrison Wells getting put in a wheelchair after pushing one of his scientists out of the way.

Even though some Metahumans as they were calling them had began to appear, Central City said that they didn't need Ben or the Plumbers dealing with this as they had their own way of handling it.

Sure enough the Metahumans were ending up in jail but the CCPD weren't saying how they were doing this.

He finally made it to his Grandpa's office only to find him staring intently at his computer's screen

"Hey Grandpa, what are you looking at?" Ben said

Max looked up at him.

"We picked something up in Central city from where some nut job calling himself the Trickster put bombs on opposite side of the city only for them to mysteriously be disarmed before the police could get to them but the cameras on a building did capture something interesting, it appears to be a being running incredibly fast."

"How fast are we talking?" Ben said getting interested

"Faster than any alien in our database, including your transformations. Here take a look" Max turned the screen to where Ben could see what appeared to be a trail of electricity navigating between vehicles and oddly enough the trail did make and image.

A lightning bolt.

Ok, I hope you guys enjoyed this and how many of you understood the Keystone City reference?

Now let me make this clear, this is not the first chapter of a new story but a one shot where I plan to have multiple one shots of different DC heroes and how their origins could be tweaked to fit into the Ben 10 verse and how they change.

Now I have an idea for Batman, Green Lantern, Green Arrow and Martian Manhunter as well as the Justice Society of America. And I may even do Justice League when I get the individual one shots done. If you want me to do any other heroes or villains you would like to see this done for then let me know and I'll think about it

How many of you can figure out Harrison Wells double meanings when he talks and for those who have not seen the TV show can you guess which Flash character he is?

Until next time.

Please review, and thank you for reading and have a nice day!