Author's Note:

Hi there! Big Ben 10 fan here!

Honestly this fanfic was born out of a need. I love the Ben 10 fanfic Community and honestly want to see better crossover content. And I haven't really seen a good Ben 10 MCU crossover.

Originally I planned to do the whole "Ben gets pulled into an alternate dimension", then I got inspired by BigPear's "A Result of Consequence":Why not just merge the Universes?

This story takes the form of an alternate Omniverse story, after UAF. Ben is 19, with a brand new Omnitrix in the prime of his life. Also don't bother asking for a pairing, I already know who I want Ben to end up with. You can try guessing, though.

BTW I'd love to see reviews and thoughts. I'm no writer, just a computer guy with a love for creative writing. So this fanfic will grow the more input it has. So please if you read, kindly drop a review, maybe ideas for how the MCU interacts with the Ben 10 universe.

Also: this will most likely be a weekly thing,if I actually remain dedicated THIS TIME

Obligatory disclaimer: I don't own Ben 10 or Marvel.


CHAPTER 1

Age of Heroes


Benjamin Kirby Tennyson had seen many things in his life, and it seemed the universe always found interesting and bizarre ways to surprise him. The 19 year old was in his prime, having survived more misadventures than the highly trained veterans thrice his age. And yet, nothing could've prepared him for the New Age that met him at the prime of his life.

A billionaire genius flying around in a suit of weaponized armor. A supersoldier's apparent resurrection from his tomb of ice. Reports of a caped man wielding lightning. A green giant rampaging through cities, trying to outrun the militant forces bent on its recapture.

This truly was a new age of heroes

And also monsters. Inevitably.

Ben was no stranger to either monsters or heroes, he'd encountered a handful of them even at a young age, his first years of crime fighting after coming into the possession of the Omnitrix, a powerful device that enabled him to assume to alien forms, forms capable of things humans could barely dream of. A wristwatch-like device attached to his arm, brimming with power enough to attract the deadliest and most sinister forces the galaxy had to offer.

Its creator (and constant pain-in-the-ass) Azmuth, had just visited Ben, gifting him with an upgraded version of the Omnitrix, along with new responsibilities. With humanity's awakening into a new era, new threats would be inevitable, and Ben would need to be prepared to face them

"Apparently not so prepared that he locks away the Master Control, AGAIN" Ben huffed. He was tracking down some alien activity in the middle of somewhere, tracking down a mysterious signal provided by the agents at Plumbers Headquarters.

Plumbers HQ apparently had gotten a solid lead thanks to an "anonymous tip", and Ben, eager to get in on some action, offered to check it out. Plumbers constantly monitored earth's channels, as they functioned as an intergalactic peacekeeping effort made of both humans and aliens, with its very own Earth Department. Ben's grandfather, a decorated veteran of the plumbers, had sanctioned the mission for Ben to take care of.

His car smoothly rolled down the dusty streets, it's silence reminding Ben of the alien technology at its core, but more importantly, his loneliness. Ben was on a mission, yes, but he'd never been on a mission alone.

His team had disbanded after their last mission stopping a lunatic dressed as a clown from robbing a brain from Bellwood's brain bank. His cousin, Gwen, and his nemesis-turned-friend-turned-brother-he-never-had Kevin E. Levin.

Both had moved on, seeing the New Age of heroes as an opportunity to retire and pursue simpler life experiences: Gwen moved to college, with her boyfriend Kevin right on her heels: he'd found a place near Gwen's campus to work.

After the trio shared an emotional goodbye, Ben moved on with his task of disposing the clown into the nearest Plumbers' holding cell, all the while reassuring himself that he was a hero, after all and "didn't need a team to get things done". As if to prove himself right, he jumped at the chance to take a solo mission from Plumbers HQ.

Ben's musings were brought to a halt as his car's radar beeped in recognition: he'd reached the supposed "mission". He stepped out, surveyed the dilapidated environment (natural instructs he'd honed over the years) and stretched.

"Oohh yeah, that's the stuff!" he croaked out before stepping up to the sight of an abandoned warehouse next to a pier, it's wooden platforms projecting into the nearby sea. The warehouse was in rough shape, weathered by rot and age.

"Oh yeah, this definitely has bad guys hideout written all over it",

Ben kicked an empty can, hearing it clank noisily along the street. It bounced several times before hitting a cluster of trash cans a block away, a dull thud ending its impromptu journey across the poorly lit asphalt.

Chuckling to himself, the teen hero strolled forward, past the discarded can towards the warehouse. His sense of smell caught a whiff of rust accompanied by seawater, while his ears picked up the caws of seagulls, but something else caught his attention

A low hum. Metallic, and definitely NOT rusted.

His battle instincts flared.

WHIRRRRRRR...

Ben whipped his head around, alarm bells going off.

The trash cans where visibly rattling.

CLICK.

BANG!

A cluster of turret guns had somehow popped out of the cans, revealing they were nothing more than a cover. They instantly locked on to the teen shapeshifter, laser sights trained on his lanky form.

"Awww mannn!!!"

Ben dove to the side, narrowly avoiding the barrage of fire from the turrets. Quickly rolling he found cover behind a nearby building, an peeped out of his hiding place to see more turrets had popped out of the street, training their sights on him.

"Classic villain ambush 101! Dang it Ben!", he chided himself.

"Alright, it's hero time! Gonna take out the trash!"

The teen quickly brought his left wrist to his eye level, activating the Omnitrix with his right arm.

BEEP!

"Okay Omnitrix, let's go HUMUNGOSAUR!!"

Spinning the dial, he selected the image of the Vaxasaurian before slamming the dial!

BLAM! FWOOSH!

Ben was enveloped in an blast of green light, the Omnitrix transforming his body on the biomolecular level.

The light died down to reveal the form of a four armed, bluish monkey like creature.

"Spidermonkey?! WHY DO YOU HATE ME, OMNITRIX??!"

The barrage of gunfire interrupted Ben's rant as his cover had been reduced to Swiss cheese, peppered by turret fire focused on his location.

Spidermonkey screeched as he leapt in the air, his unnatural agility propelling his trajectory in an arc mid-air as turret fire followed his form. The arachnimp retaliated with a series of Web blasts from his tail, easily tagging few of the mechanised killing machines.

Springing from the lamp posts, Ben spun, swung and danced his way through a hail of gunfire, picking off other turrets one by one. A stray shot cut down a lamppost, bringing the alien primate tumbling down, along with piles of debris knocked down by the turrets. .

"SCREECH!"

Ben managed to right himself by spinning as he landed, narrowly avoiding the collapsing street lamps and the shower of debris . The remaining turrets opened fire on the vulnerable arachnimp. Ben leapt once again, swiftly avoiding another Salvo. The debris has caused a small cloud of dust to cover the street.

"Its a good thing you dumb robots can't hear me, cuz I've got a mouthful for ya!"

"Yipeee-ki-yay!!"

A web line shot from the dust cloud snagged a turret before pulling Spidermonkey into the fray, smashing the turret with his small yet powerful fists. Ben began leapfrogging between turrets, their restricted angle of fire not allowing them full 360 firing range. He used the webbed robot as an impromptu wrecking ball, dealing with the rest of the ambush in a display of strength.

"Take that! And that! And summa' that!" The arachnimp tore through the turrets easily, it's speed matched only by its ferocity. Ben landed in a crouch, having destroyed an entire blocks worth of turrets.

"*Huff, huff, that all you got?"

A loud rumble from the warehouse seemed to reply. The entire street began to crumble, as more buildings gave way to uncover its robotic inhabitants.

Giant, robotic inhabitants.

"Why did I have to ask?!!"

The mech giants surged towards Ben, mowing down the nearby abandoned buildings with ease. Leaping once again, he managed to avoid their barrage. He ran up their bodies, his adhesive paws easily letting him scale surfaces.

Unfortunately, these robots had other ideas.

WHOOSH.

A series of hidden compartments sprang out of the mech's shoulders, releasing clusters of missiles aimed at the teen shapeshifter.

Spidermonkey dove off the mech's arm, using his webbing from his tail like an improvised bungee cord, catapulting him unto the second mech. Avoiding another round of missiles, Ben used Spidermonkey's reflexes to snag a missile with webbing, spinning it around towards the face of the robot. It exploded, destabilizing the mech, allowing Spidermonkey to Web it's arms to a nearby building, before jumping atop aside building and pulling the unstable wall on the mechanized Titan. Thinking fast, Spidermonkey dodged to the left before an energy beam tore through the building.

"Of course, they've got freaking lasers!!" lamented the Alien teen before dodging another blast.

"Okay, gotta think smart! These things are basically mindless bolt-buckets with flipping lasers coming out of their hands"

"Gotta use their own size against them!"

Ben began leaping from building to building, forcing the mechs to give chase. He cut his path and began heading towards the Warehouse. The robotic behemoths split up to cover more ground.

"Hey metalheads!!! Over here!" Ben hollered from the top of the warehouse. They both took aim, before Ben dove directly into one of their arms, using his webs like puppet strings and pulled the arm in the path of the other mech. The latter's self defense programming kicked in, as it tried to Dodge the path of the laser.

Unknown to the mechanical giant, Ben had webbed its feet together while running towards the warehouse, causing it to stumble and crash into the other mech. Ben used that opportunity to web their arms together, before diving out of the way.

BOOM!!! The mechs had shot into one another, taking them both out of commission.

Ben landed at the warehouse entrance before changing back. He opened the large doors before peering inside. The outside light filtered into the warehouse, illuminating its dilapidated interior.

"Okay, you can come out now! I totally creamed your robot pals!"

Several more turrets popped out of the warehouse's floors, aimed at Ben.

"Y'know kid, I got a saying", a commanding voice belonging to a figure hidden among the scaffold

"Always keep BOTH eyes open"

The figure stepped out of the shadows to reveal a bald African American man in a black trench coat with an eyepatch.

"Nick Fury?" Ben's surprise was apparently amusing to the man, who snapped his fingers, causing the turrets to pop back into their hiding places.

"It's been a while, Kid".


Authors note: Sorry if the fight screws felt sloppy or drawn out. I rewrote this scene like 4 times, but unfortunately I had to go with the simplest.

Don't forget to leave a review! Thanks for reading!