Disclaimer: I do not own Ben 10 or Batman.

I would like to point out that none of these origins are in any chronological order so some may reference things that took place before previous origins.

Secret Origins: Batman

To say Ben Tennyson was excited would be an understatement. He was ecstatic to be going to his childhood heroes, Captain Nemesis, party. Even though he was technically using Jennifer Nocturnes plus one to the party.

He had been trying to talk to Captain Nemesis, but he had left to talk to some older people who Ben thought looked like Military. He was brought out of his thoughts by Jennifer grabbing him by the arm.

"Come with me Ben I want you to meet someone" as she pulled him she yelled at a man who's back was to them.

"Bruce!" the man turned around and Ben recognized him immediately, how could he not recognize the man who had pledged to use his businesses resources to help improve the most crime ridden city in the nation and had been held hostage by the Riddler only to beat the mad man himself, Bruce Wayne.

"Mr. Ben Tennyson, it's a pleasure to meet you" Bruce stuck out his hand to shake.

"It's nice to meet you too Mr. Wayne" Ben said shaking his hand

"Please I'm only 21, a few years older than you, call me Bruce" he said smiling

"Speaking of Superheroes Bruce, I heard that Gotham has some kind of Batman running around at night" A man to their right said

"I heard he's an urban legend like the boogey man" one woman said

"I heard he's a vampire who sucks the blood from criminals" an older man Ben recognized as being a news anchor said

"Well I've heard that he's some kind of giant mutated bat" yet someone else said

"I've heard of him too and the Plumbers say that if he exists he isn't an alien" Ben said

"You mean the Plumbers don't know if he's real or not?" Jennifer said

"From what Grandpa said there are definitely signs of something going on in Gotham but nothing concrete"

"Well that certainly sounds interesting" Bruce said

They all continued talking for a while until Bruce Wayne left the party saying he had a flight the next morning back in Gotham.

However, a week later something strange happened.

The plumbers had tracked down a Forever Knight stronghold that was reportedly filled with large amounts of dangerous illegal alien technology. The Plumbers had come to the castle like structure with the FBI to perform a raid.

They prepared for a fight after seeing that all the lights were off.

But as they broke the door down and ran in it wasn't what they expected to see.

All throughout the place was unconscious Forever Knights. Some were on the ground in fetal positions, others were lying in piles of broken furniture and some were even hanging from the ceiling by some kind of cable.

There was even someone moaning from where he was in the chandelier, almost like someone threw him into it.

Looking at all the damage to the castle and the knights a normal person would believe that a small army had attacked the place.

Finally one of the knights regained consciousness. He looked around franticly as if he was scared to death, not of the Plumbers but something else. His eyes darted to every dark corner and crevice.

"Hey, what happened here" Kevin asked bending down next to the knight

"It was some kind of Bat-Demon" he said, all traces of the practiced old English accent and speech gone. "The lights just cut off and then more and more of us began disappearing one by one so we were told to come here to keep whatever it was from getting out but it still came! Suddenly some of us were being pulled into the shadows and walls, through the floors and then we finally saw IT!" he talked about all this quickly as if the mere subject scared him.

"It was huge! It was like a living shadow with pure white eyes, we tried to fight it but it was too fast and strong, none of our attack hit it and it tossed us like we were ragdolls, it slammed me into the wall and that's all I know!"

All of the Plumbers and FBI agents looked at each other, what the man had just described sounded like something from a horror movie, and this was coming from a guy whose organizations whole point was to hunt doe aliens, even dragons and they never seemed to be afraid of those things so what was this?

Later they would discover that some of the crates containing stolen alien tech were missing, although the Plumbers would just count it as misplaced or missing.

Gotham City the next day

Bruce stood at the recently installed super computer in his cave adding in some of the technology he had gained from his recent late night activity.

"Busy as usual Master Bruce?" Alfred Pennyworth said coming down the stone steps carrying a tray of food and a cup of coffee.

The Cave was mostly bare with the computer, a motorcycle, a table for Forensics use and gym equipment along with some souvenirs from his past victories, and a replica costume of the Gray Ghost in a glass case.

"Just making some Modifications Alfred" Bruce said

"Of what kind sir?"

"Some of the technology I took from this 'Forever Knights' was valuable because it allows you to directly access the Plumbers main database"

"And this interests you why sir? You already said that the Plumbers found little to no alien activity in Gotham" Alfred asked confused

"Yes and while Gotham is my main concern things that affect the nation affect Gotham, and things that affect the world affect the nation. And things that affect the universe affect the Earth" Bruce said as the computer began to pull up the Plumber database on it's screen. Bruce looked over at the other crates he had brought back.

"Whether we like it or not, for my crusade to rid Gotham of the criminal and corrupt to succeed, Batman is going to have to go both international and intergalactic"

Usually Alfred would argue for his safety but tonight was not the night for it

"And what of those other crates?"

Bruce smiled in satisfaction

"Some technology I thought would be useful, some machines I can add to my suite to enhance my strength, speed, agility and endurance. Some advanced scanning equipment, universal translators and even some shock absorbing, light weight, and body armor" He said

"I also downloaded all of their reversed engineered technology onto a drive and sent it to Lucius to replicate." Bruce said, already imagining how much more crime he could stop with this added technology.

"Well that's all fine and good but I also came to tell you that the Commissioner called and wanted me to let you know to meet him at the usual time, so you might want to get going when your done with the Bat computer"

This drew Bruce's interest

"Did he say why? And we are not calling the computer that"

Alfred looked at him with a confused look

"Something about a clown?"

Na na, Na na, Na na, Na na Batman!

That's right Batman has appeared in the Ben 10 verse! What did you all think? Can you name all the batman references and characters?

I hope I did the Alfred and Bruce interaction justice as those two are always fun to watch banter back and forth.

One of the things I wanted to highlight in this chapter is how he is seen as some kind of supernatural being. We the readers know that Batman is just a man but the average joe in the DC universe doesn't know this and most believe that Batman does have superpowers and before he became more well known and a member of the Justice League he was regarded as an urban legend and those that believed in him thought that he was some supernatural, otherworldly being.

It is public knowledge that Bruce Wayne is skilled in martial arts in the DC universe and he's actually interacted with some of his villains as Bruce Wayne and held his own, so I thought the idea of him defending himself as Bruce Wayne and beating a villain would make him have the same positive image he has in the DC universe.

If any of you are wondering why the FBI were working with the Plumbers, here is the way I look at it, the Forever Knights are an exclusively Earth based group with no alien members but they do steal alien tech and commit crimes against aliens so I don't think that the plumbers could just arrest non aliens as most of the Forever knights were likely American citizens, it makes sense that the American authorities would be able to arrest them, so think of it as the two groups cooperating with each other.

I added Batman wanting to go to an intergalactic level simply because I thought of Batman legends popping up around the Ben 10verse and him fighting the likes of Aggregor, Vilgax, Psyphon and the Incursions as epic.

Plus imagine if Batman had access to alien tech, what would he be like then?

Who should I do next?

Also on a side note I thought about doing one of these with marvel heroes and villains as well, yay or nay?

Now for reviews

HVulpes2.0: I'm planning on doing female heroes and villains as art of this but I tend to do this as it comes to me, you will see the Alien Force and Plumbers reaction to the new heroes as well as the aliens in the universe such as Azmuth and the Galvans, Vilgax, and the Incursions among others to this new heroic age.

Rocker on: I haven't thought of Plastic man yet but I do have a plan for Wildcat and the other JSA members, thanks for the complement.

Actually the particle accelerator is from the Flash TV show, glad to see another flash fan he is one of my favorites along with Superman, Batman, Martian Manhunter and Captain America and Spiderman.

Johnathan: I have an idea for Mr. Freeze and the Lantern rings and a little of one for Deathstroke, I'm not sure with Bane though as there isn't much to work with in his origin. But I'll think on it.

Sadarji5000: Correct, although I haven't really watched the show other than like the first episode of two I have heard about what people have said about it. And so when I heard about the whole Harrison Wells thing I decided to include it, but my favorite Flash is Wally West.