((I do not own any of the characters from both Marvel and Capcom. I in no way gain any profit from using the characters from both companies and their usage in this fanfic is only for entertaintment))
[SPOILERS!! Please do not read further if you have not seen the Story Mode for MvCI. Viewers are advised.]
Also this might be the long version and I will be implementing some aspects and ideas from the original story mode of Marvel vs Capcom Inifite but not all of them. I'm looking at you Oblivion :(
Iron Man, the leader of the Avengers, a group of super-powered or incredibly skilled people tasked with protecting Earth from any threats that were to befall upon the planet was simply patrolling the city flying in his iconic armored red and yellow iron suit as he usually do before Jarvis, an AI programmed within his suit told him about a powerful energy coming from outside the city. As he went to look for the readings of said energy, a powerful blast almost hits him. He then saw large amounts of humanoid machines coming out from some portal, attacking nearby civillians. Before he could attack, he began to recognize the design of the robots. " Ultron?!" He said to himself as he had thought Ultron was destroyed long ago.
Feeling that this problem is actually bigger than it looks Iron Man quickly called the Avengers and fought againts the army of robots. As he was busy blasting the robots with his repulsor beams, the nearest Avenger had arrived in time to take a shot at a robot that was about to take a shot from behind. " You rang?" Hawkeye, one of the non super-powered member of the Avengers had came in on his motorcycle and with this both Hawkeye and Iron Man fight againts the robot menace.
After the battle, Hawkeye scoffed how he shot more robots than Iron Man did and asked about being promoted. Iron Man reminded him about how their battle was a reminiscent of the battle againts Ultron. Hawkeye already acknowledged it from went they first fought the army of robots and said if they have already defeated Ultron once, they sure as hell can him defeat him again. Iron Man, feeling a bit unsure decides that they should get to the Avengers Tower to talk about the incident but suddenly the same portal opened up and Doctor Strange had walked through it, surprising both Iron Man and Hawkeye
" You're Strange, right? Did you had anything to do with the army of robots?" Hawkeye asked with his usual irritated tone. "Dr. Strange, to be precise. And no, I am still trying to fix the problem. I'm afraid that this mess is far greater than what I have imagined." Iron Man then intervines." What makes you say that?"
"It would seem that Ultron...has returned. And he now has a new name for himself. Ultron Sigma. I tried to overpower him but he's far too resilient for any of my magic to stop him completely. What I am afraid the most is that, Ultron might have already gotten the power of the Infinity Stones. But not all of them."
" The infinity stones? Mind me asking what on Earth that is?" Hawkeye asked, getting a bit tired from not knowing most of what Dr. Strange had just explained to them. " They are stones powerful enought to give a person the power to manipulate time, space, reality...to make it sound more simple, make you as powerful as a God."
" Great. More 'gods' for us to beat up." Hawkeye said while crossing his arms. Iron Man then voiced his own opinion in a more serious tone." We've already seen the damage that Ultron has done by only himself...if he has that kind of power already-"
Suddenly, the ground beneath them began to shook. "No...!" Strange said as buildings and the ground itself are beginning to change, as if another city is forcefully mashed up into their own and becoming a different city entirely. Cars stopping as people ran from imense energy coming out from the ground. Seeing this, Iron Man tries to fly off and save them but Strange stops him. " What are you doing? There are people dying because of th-" Before Iron Man could continue, Dr Strange cuts him off. " I know but they are safe for now, it is the city itself that needs saving soon. We have to leave." Strange said in a stern manner.
" What about the others? We can't just leave them here." Iron Man said." Dr. Strange shook his head." If we don't destroy Ultron now, who knows what destructions he'll be causing upon our world. Let the other Avengers protect this city. I doubt Ultron will allow this place untouched."
" Sigh, and I actually had plans for tonight. Let's go then." Hawkeye said as the three of them entered the portal.
Meanwhile, in the year 2XXX, Abel City...
X and Zero, androids tasked with protecting people from out-of-control robots called Maverick, hence given the name Maverick Hunters were busy attacking the same robots that fought againts Iron Man and Hawkeye. Both X and Zero combined both of their powers to wipe a large amount of the robots but to no avail." Damn it! Where do they keep coming from?!" Zero said angrily as he sliced many of the robots into pieces. X was shooting many of them before stopping to find a better spot to shoot them all from." I have no idea. Alia! Do you have any information on these drones?" X asked his navigator about the swarm of robots attacking both him and Zero.
" None I'm afraid. These drones matches no other Mavericks in our data base. Moreover, I've never seen their designs before. Take further precautions X! I'll see what I ca-" "Alia?..Alia! Do you read me?" X shouted as the woman he was talking to suddenly got cut off." Zero looked at X with a worried look in his eyes. "What's wrong X?" He asked as he quickly shoots three of incoming drones.
"Alia...she's been cut off. Wait...?!" X looked in horror as his beloved city is starting to transform and the bridge that they were on began to change as well." W-What's going on?!" Multiple layers of unknown subtances began to envelope the bridge and multi-colored lines,resembling that of a rainbow were formed onto the newly builted bridge. Even with all of this going on, the army of robots still kept attacking the two Maverick Hunters.
"Alia?...Alia!" X tried to contact Alia but to no avail. He then looked towards Zero for his reaction on the event that has folded itself and suffice to say, his reaction is the same as X, bewildered. " Were we teleported?...no, our coordinates doesn't seem to have been changed. This is still the city." Zero checked his readings as he looked around his surroundings.
" How long have our battles continue to prolong the ineviatable...X?" A metallic yet sinister voice was echoed around both X and Zero. Both of them looked shocked and horrified of the existance of the voice. " Sigma?!" X shouted first, readying his buster. In just a swift moment, a large plasma sword was about to slice X's face when Zero stepped in and was easily overpowered by the more powerful and tall robotic figure. " Stay out of this, failure!"
What stands before them was a figure bearing a striking resemblence Ultron but with the face of Sigma, X's and Zero's archenemy on the body. " You've had so much potential...but you chose to surpress them. I should've just destroyed you till no scraps were left behind!" Ultron, now Ultron Sigma grabbed Zero by the face and was ready to kill him off when X shot a powerful blast, only pausing the more powerful robot. Ultron Sigma then looked at X and threw Zero right at the blue android. " Fine then, let us fight and you'll truly feel the power I have within me." Ultron Sigma, with Sigma's conciousness more dominating the robot readied himself.
After a loosing battle, X slowly gets up and tries to help Zero to get up. Zero tells X to teleport himself away and get more powerful as well but X declined. Ultron Sigma then casted an incredible barrage of meteorite-like energy projectiles from the sky, looking very deadly. Unfortunately, both Maverick Hunters are at this point too badly damaged and tired from the fight were on the point of life. With little energy that he have had left, Zero quickly pushed X off the bridge and into the giant chasm below them."...?! Zero!" X shouted before he was sent into the chasm and transported into an unknown location. Zero, staggering to dodge the incoming attacks glared at Ultron Sigma laughing maniacally before getting hit by one of the attacks.
(( So how did I do? Not my best work but I'll try to make it more interesting. I am also thinking of not using some of the characters in the game and use characters I've known like Amaterasu and Waka. Not much of a Marvel fan but I'll keep their personality and history in mind okay? Feel free to point out my mistakes and hope you enjoy this story!))