Rated T for swearing and bloody gore later in the story.

"-" This means someone is talking.

'-' This means someone is talking through their mind (Not saying words, just thinking)

# This means something changed scene.

The film they're watching is M rated.

Also, the first time I mention a character's name, I would type down their full name. (Except when the name is spoken by someone)

It happened

Two ordinary boys with weird shaped heads were writing down blueprints for a revolutionary rocket in their backyard. The rocket is proposed to be smaller than NASA's space shuttles yet a billion times more powerful.

"Do you really think we can build an antimatter reactor and use it as our fuel source with the limited resources we have…" Phineas Flynn wondered. "…without having to worry about the dangers of antimatter making contact with ordinary matter?"

Ferb Fletcher thought about it for a moment, then made a gesture that indicated a 50/50 chance.

Phineas stared at the blueprints. "You know what, let's just take it down a bit and build a cold fusion reactor instead."

Just then, a Mexican Jewish girl walked into the backyard from the front gate and greeted the two boys, mainly one of them.

"Hey Phineas, whatcha do-?"

FLASH!

A bright flash appeared and disappeared, taking everyone in the neighbourhood with it.

#

Somewhere on top of a hill far away from the neighbourhood, a man wearing a pretty lean dark green exoskeleton armour with a tiny bit of muscle cuirass, was spying on the two boys with his omnivision spy helmet, the two boys who disappeared from sight.

(The armour he wore looked like Iron Man and Ultron's armour from the MCU, Optimus Prime's armour from Transformers: Age of Extinction and Batman's exoskeleton armour from the DCEU, all fused into one)

"Max, where the hell did they just go?!" The man shouted in panic.

"Well I'm detecting a huge quantum fluctuation within that area so it's most likely that-" Max the AI spoke.

FLASH!

The man disappeared from sight.

#

A famous superhero and his sidekick were hanging out at Mr Smoothies, discussing about random things that came to their minds.

"Hey Ben did you know that-" Rook Blonko stated.

"Yeah, yeah, yeah, it took Mother Nature hundreds of thousands of years to create some rock in the middle of nowhere." Benjamin Kirby Tennyson replied in a rude manner.

"Millions actually," Rook corrected him.

Ben signed in boredom. "I wish something exciting would come by like something would try to attack me. I mean like nothing has happened in the past month and I'm getting super bored really fast!"

"I thought you said that the world would be better off without someone trying to conquering it," Rook pointed out.

"That's not what I meant!" Ben responded, getting frustrated. "What I mean is that…!"

FLASH!

The two were gone.

#

Somewhere in Providence HQ, a young extraordinary man was playing video games with your average normal human and a smelly chimpanzee.

"So, how's everything going with Circe?" Noah Nixon asked.

"It's pretty good, so far, I guess," Rex Salazar replied.

"You know what I would do if I were you. I would ask if she wanted to-!" Bobo Haha tried to speak.

"Bobo, don't you dare finish that sentence!" Rex blushed like a tomato.

"Bobo, Holiday, Rex, Six, report to the War Room at 1300."

Rex checked the time by pausing the game. "5 minutes. Think we can finish the level before then?"

"Only one way to find-" Noah replied.

FLASH!

No one was left in the building.

#

Seemingly lost in a strange and beautiful forest, two beautiful and powerful women were trotting through the dense vegetation, observing the unique and wonderful scenery around them.

"You think we're lost?" Asami Sato asked.

"Maybe," Korra replied. "I'm gonna ask a couple of spirits to tell us where-"

FLASH!

It happened again.

#

Somewhere in a superhero mansion, an immensely powerful green beast was chasing someone wearing purple.

"YOU BROKE MY CRYSTAL ANIMALS!" The Hulk roared while he chased a man down a hallway.

(Hulk and his 'puny' equal are two different people)

"Hey chill out man! It was an accident!" Clinton Francis Barton screamed and ran for his life. Guess he's now getting his midday exercise.

#

Clint ran past the lounge room, followed by the Hulk. Two other superheroes were watching TV, one of them skimming through the channels in looks for something interesting.

"Such barbaric behaviour," Vision commented.

"Aye, it makes you wonder if he ever tires," Thor Odinson stated.

The God of Thunder then stopped changing channels when he landed on a News Channel, reporting a bank robbery that is happening right now.

"We are needed," Thor stood up.

"The police are on their way and I calculate an 84.6% chance of the bank robbery ending in failure," Vision told him. "We are not needed."

Thor raised an eyebrow, but heeded Vision's words and sat back down on the couch.

#

Anthony Tony Stark heard the fuss all the way from the labs as he and Samuel Thomas Wilson worked on upgrading the Falcon Suit. He rolled his eyes and sighed in annoyance.

"So this new upgrade will increase my velocity up to 25%?" Sam asked.

"Of course," Tony assured him. "I upgraded it."

Just then, the speakers in the lab produced a repeated beeping sound.

"Yep, what is it J.A.R.V.I.S?" Tony spoke up.

"Sir, I've detected an unusual quantum fluctuation located in Danville," J.A.R.V.I.S informed.

"Danville," Tony raised an eyebrow. "How powerful?"

"If everyone had the technology currently stationed within the Mansion, it could be detectable from across the world," J.A.R.V.I.S stated.

The billionaire then realized something and smirked. "I wouldn't be surprised if those ki-"

FLASH!

Where did everyone go?

#

Inside a Victorian-style brownstone townhouse, a man wearing a red cape and a blue robe was levitating in the air, meditating on the cosmic energy that surrounded him.

His eyes then shot wide open.

'I sense a disturbance in the univ-' Stephen Vincent Strange spoke.

FLASH!

The Sorcerer Supreme disappeared.

#

(Imagine any other character from your favourite cartoon show)

All the people who disappeared ended up being piled onto each other in one section of an oddly shaped room.

"What the fuck?!"

"Well that was unexpected!"

"Why do I have the feeling that those kids are responsible for this."

"GET OFF OF ME!"

"I'm getting really angry right now."

"Those boys are soooo busted!"

"My leg!"

"Well hello guys," Someone spoke up.

A super soldier grunted as he pushed himself up and noticed someone besides him.

"Hey, let me help you with-" Steven Grant Rogers paused as he recognized the bald red skinned man.

"I do not need your pe-" Johann Shmidt went wide eyed as he saw who was next to him.

"Red Skull!" Captain America frowned.

Red Skull frowned with rage and used a back-fist strike on Steve, making the super soldier stumble.

The Avengers saw this and took a battle stance.

"Captain America, we meet again," Red Skull pulled out a Luger pistol and aimed it at the superheroes.

"Everyone hold your ground!" Steve ordered.

"What does it look like I'm doing?" Clint retorted.

"Guys," The same person from before spoke again.

Many other supervillains in the room pulled out their weapons/stood in the battle stance, now stalemating each other in some sort of Mexican standoff.

Supervillains pointed their weapons at superheroes and other supervillains.

Superheroes pointed their weapons at supervillains.

Many pointed their weapons just to show off.

The other half of the crowd crouched down and covered their heads in fear.

A few remained stoic and just stood in place.

No one made a move, no one spoke.

The man who tried to reach out to them decided to remain quiet and watched in interest as to how this would play out.

Ben stood by his friends and family, the tip of his finger on the Omnitrix, ready to transform at any moment.

"Seems like every supervillain we've ever met are all here," Kevin Ethan Levin noted down.

"How did we even end up here?" Gwendolyn Tennyson whispered.

Ben looked around and spotted someone he knew from long ago, standing side by side with his friends and family.

"Rex?!" Ben called out.

Before Rex realized who shouted out his name, all hell broke loose as everyone fired/launched their weapons.

Then, shocking everyone in the room, the projectiles froze in mid-air.

Everyone was left dumbfounded as they stared at the projectiles held in place within the air.

A firebender from the Avatar's universe inspected the fireball he intended to throw at a random supervillain.

"Huh," Mako reached out to touch the fireball. His hand phased through the fire and he didn't recoil his hand in pain.

"It's not even warm," Mako raised an eyebrow as he pulled back his arm.

"That's because I've froze time in the area of the projectiles and slowed the vibrations of the matter to a halt…"

Everyone looked to see where that voice came from.

"…and if you're probably wondering how I did that and how your hand was not affected by the time freezing field I've created…" The person spoke. "…well, that's an explanation for another time."

The Avatar stepped forward.

"Who are you?" Korra asked politely.

Just then, the projectiles disappeared from sight, surprising everyone.

"My true name, I shall not give way," The man replied as he created a ball of particles in the palm of his hand from the projectiles that used to exist. "I am referred by many names and titles, but you can simply call me 'Guy' for now."

A few raised an eyebrow as to why he chose such ridiculous name. The rest however were too focused on the Guy's right hand that held the ball of particles.

The Guy clenched his right hand tightly and then opened it up, revealing a spider in his right hand.

"Now you're probably wondering why you're all here," The spider crawled up the Guy's arm and to his left shoulder. The Guy trapped the spider with his right hand.

"I have teleported you people here to watch a film about your destiny, including six individuals who will play a major role in the film," The Guy removed his hand, butterflies taking flight from his shoulder.

Everyone was awestruck as the Guy demonstrated his powers. One of them shook his head and frowned.

"And who are these individuals you speak of?" Victor Von Doom questioned him. "Doom demands to know!"

"Wow, even after the power I've demonstrated, few still threaten me," The Guy raised an eyebrow. "Anyways, these are the six who I am referring to."

Just then, the room became pitch black and six spotlights appeared, blasting light onto one person each.

These individuals were Phineas Flynn, Ferb Fletcher, Ben Tennyson, Rex Salazar, Korra and another unknown individual.

Everyone eyeballed the six; making one of them feel very uncomfortable.

"There's a movie about me?" Korra asked.

"Yep," The Guy confirmed her thoughts. "Well in my head actually. You see, the film was created by my thought alone."

"Oh," Korra replied. 'How does that work?'

"Ben?!" Rex was shocked to see a distant friend of his again. His shocked expression then disappeared. "Wait, you are the Ben I know, right?"

Ben smirked in response. "Well I know you so does that prove something?"

Rex smiled and walked up to him. "Ben, it really is you, how have you been?!"

"Great…bored actually," Ben greeted him.

"Well you're in luck Ben cause what your about to see will definitely keep you excited!" The Guy assured him.

"Hey!"

Everyone now looked at one of the six who walked up to the Guy.

"Is it really necessary to show these people their future?!" The man questioned him. "Cause I've seen fragments of my future, and trust me, it does not end well?"

"Do not fret Zaxx," The Guy replied.

"How do you know my name?" The eyes of his helmet became slits as he squinted at the Guy.

(His helmet can mimic and project the wearer's emotion, but only the eyes, not the mouth or any other facial features)

"That is an explanation for another time," The Guy responded calmly. "Now as I said before, do not worry about anything. Once you've seen the film, I'll send you and everyone else back to their universes at the same time I've teleported them here without any memory of this, if they choose to forget the memory that is."

Zaxx Verralax thought about this for a moment as he rubbed the chin of his helmet. He then sighed in annoyance.

"Fine, but one more question." Zaxx pulled out a Plasms Handcannon (pistol) and pointed it at a 10ft tall humanoid alien with a rather scary face.

Everyone around him except for three leaned/moved out of the way in fear. The three seem to be in the same alien species as the tall one.

"What are those guys doing here?" Zaxx growled as the Handcannon began to produce a dim blue light.

"Here to watch the film of course…" The Guy replied. "…just like everyone else."

"Are you crazy?!" Zaxx questioned him. "Do you know how dangerous those guys are?"

"I know who they are and what they are capable of, heck, even their leader can take me on in a one on one fight," The Guy admitted.

"Ummmm excuse me?"

Everyone looked down to see the kid with a head shaped as a triangle.

"Who are those guys and what makes them so dangerous?" Phineas wondered.

Zaxx stared at him for a while before he sighed. "Those men over there are-"

"Enough, I don't want spoilers," The Guy raised his voice. "And if anyone tries to hurt or kill each other, do answer to me then, capiche."

Everyone mumbled amongst each other, many questioning his motives. They heeded his warnings none the less and the mumbling died down.

"Also, your seats have been chosen by me just to let you guys know. You will find them by seeing your name on the chair," The Guy then opened the doors telekinetically. "Now, to the cinema my audience!"

Everyone complied and entered the cinema. The seats were first class (how lucky), arranged into 20 seats per row. There were 15 rows.

Everyone went to look for their seats except for one.

"Hey, can I ask you something?" Zaxx whispered.

"Anything," The Guy replied.

"…Do I really have to be near that kid?" Zaxx pointed at the kid with the triangle head. "Considering the fact at how he would react to learning the truth about his true heritage?"

"Like I said, once you've seen the film, I'll send you and everyone else back to their universes at the same time I've teleported them here without any memory of this, including the kid," The Guy told him. "Don't worry mate, I can assure you everything is fine."

Zaxx stared at him for a while before he walked off to find his seat.

#

"Well this is a lot nicer than the seats in the Pro-bending Arena," Lin Beifong commented.

#

"This is a really small cinema," Carol Susan Danvers whispered.

#

"Out of the way you peasant!" Doom growled as he shoved someone into a seat.

"Hey, you can't just…oh wait, that's my seat." The random stranger made himself comfortable in his seat.

#

Soon, everyone found their seats with little to no fussing about.

From left to right starting from seat 5 in the front row was Buford Van Stomm, Baljeet Tjinder, Isabella Garcia-Shapiro, Phineas, Ferb, Zaxx, Korra, Rex, Ben, Rook, Natalia Alianovna Romanova, Hawkeye and Ms. Marvel.

From left to right starting from seat 4 in the second row was Captain Calan, Phillip Coulson, Maria Hill, Charlene Doofenshmirtz, Heinz Doofenshmirtz, Vanessa Doofenshmirtz, Asami, Mako, Bolin, Caesar Salazar, Rebecca Holiday, Agent Six, Azmuth, Iron Man, Captain America and T'Challa.

In the third row starting from seat 2 was Carl Karl, Francis Monogram, White Knight, Nicholas Joseph Fury, Maxwell Tennyson, Tonraq, Senna, Kai, Jinora, Ikki, Meelo, Rohan, Tenzin, Pema, Bobo Haha, Falcon, Janet Van Dyne and Yellowjacket.

(If Hank believes he's Yellowjacket, then I shall call him Yellowjacket 😉)

In the fourth row starting from seat 3 was Driba, Blukic, Patelliday, Gwen, Kevin, (Skip 2 seats) Carl Tennyson, Sandra Tennyson, Dr Strange, Vision, Hulk, Thor and Odin Borson.

In the fifth row starting from seat 4 was Vivian Garcia-Shapiro, Linda Flynn-Fletcher, Lawrence Fletcher, Candace Flynn, Jeremy Johnson, Stacy Hirano, Coltrane, Biffany Van Stomm, Baljeet's mother, Irving's mother and (Skip 5 seats) Dr Doom.

(I'm too lazy to do the rest. You're just gonna have to figure out their seats while reading the fanfic story)

"Oh, and just to tell you people from Phineas' and Ferb's universe, this happens in like three years from your current time," The Guy informed. "And way we g-"

Before the Guy could start the film, a portal appeared in the front of the cinema and right besides the Guy, surprising the audience.

Then, a time walker stepped out of the portal.

"You there!" Paradox spoke to the Guy. "What do you think you're doing?"

"Showing everyone here about a couple of superheroes' destinies," The Guy casually replied.

"Do you know the consequences of showing people there future!" Paradox brought up. "An act like that could cause-"

"Yeah, yeah, yeah, destroy the fabric of time, I get it," The Guy interrupted Paradox. "But don't worry, once they've seen the film, I'll teleport everyone back to their universes without any memory of this so that the future will play out as it does in the film."

"I still won't allow you to do this," Paradox stated.

"Why not?" Everyone not stared at Ben. "Like he said, the Guy will teleport us back with no memory of this, which means it would be safe for us to watch our destinies without…doing something bad to our timelines."

"Well it's not just that Ben but the fact tha-" Paradox stopped mid-sentence as the Guy stared at him with very cut cat eyes.

(Think of him as Puss in Boots)

"*sigh* you're gonna show these people their futures no matter what aren't you?" Paradox questioned him.

"Yeah pretty much," The Guy replied, still keeping his cat eyes on him.

Paradox then made his decision.

"Fine, but that doesn't mean I'm leaving," Paradox stared at the front row. "Mind providing a seat for me?"

"Sure, take that seat right there between Black Widow and Rook," The Guy showed him said seat.

A seat suddenly appeared in between the two heroes which startled the two. Paradox proceeded to take a seat.

"Nice of you to join in," Ben smirked.

"I only came in an attempt to prevent this from happening, with no success apparently," Paradox replied.

The Guy then played the film.

In this fanfiction story, the Avengers EMH and Avengers Assemble timeline are already fused together. I did this just to make everyone happy.