Maybe an OC who is a scientist in both universes. They accidentally create a device that merges some of the characters' powers in unexpected ways. This leads to a series of adventures where they have to deal with the consequences, like a new villain emerging who has a jumbled set of powers. The OC then has to team up with some well - known characters to fix the situation.
An OC who is a time - traveler from a future where the Marvel and Capcom universes are already merged in a not - so - great way. They travel back in time to prevent the initial event that caused the messed - up merge. Along the way, they meet various characters and have to convince them to help without revealing too much about the future, as it could change things even more.
One interesting crossover could be Naruto using his Rasengan in a fight against Wolverine's claws. The clash of Naruto's chakra - powered move and Wolverine's adamantium would be epic.
The story in Marvel vs Capcom typically involves heroes and villains from both franchises coming together in a conflict-driven plot. Different versions might have specific twists and turns, but it often centers around epic battles and saving the world.
Give your OC a unique power set. For instance, if it's a combination of a Capcom character's projectile ability and a Marvel character's shape - shifting. Also, a distinct personality. Maybe they're really sarcastic like Deadpool but also have the honor code of a Capcom samurai. This makes them stand out.
One idea could be an OC who is a time - traveler from a parallel dimension where the forces of evil have already won. This OC tries to warn Star and her friends and helps them change the course of events. Another plot could involve an OC with a unique magical ability that neither Star nor the forces of evil have seen before, and this ability becomes crucial in a major battle. Or an OC who is secretly related to one of the main characters and their discovery of this relation causes a stir in the story.
One idea could be that the OC Salvatore has a unique power, like the ability to control time briefly. They use this power to outwit Katherine Pierce in a battle of wits and strength. Maybe they are fighting over a powerful magical artifact that Katherine wants to use for her own evil purposes.
The full story of Marvel vs Capcom Infinite involves a complex plot where the two universes, Marvel and Capcom, are merged in a rather chaotic way. There are various heroes and villains from both sides having to team up or fight against each other depending on the situation. It's a story full of action, power struggles, and attempts to save the merged reality from greater threats.
One idea could be that your OC has a unique power set, like the ability to manipulate time in small pockets. This would create an interesting dynamic against Wonder Woman's strength and speed. For example, the OC could slow down time around Wonder Woman to gain an advantage in a fight, but then Wonder Woman could use her combat skills to counter despite the time distortion.
One idea could be that the assassin OC is on a mission to take out a corrupt superhero who is secretly working with a powerful villain. The OC has to infiltrate the superhero's inner circle, using their unique skills like stealth and combat expertise.
Maybe the OC is a scientist who accidentally creates a device that links him to the minds of the female Marvel characters. This leads to a series of comical and heart - warming interactions as they get to know each other on a deeper level. For example, he might initially be confused by their different personalities but then starts to fall for them one by one.
One common theme is the exploration of power dynamics. When characters from both universes meet, they often compare and contrast their powers. For example, Thor's godly powers against the psychic abilities of a Capcom character.