One idea could be a team - up between Tracer from Overwatch and Spider - Man from Marvel. Tracer's time - jumping abilities and Spider - Man's acrobatic skills would make for an exciting adventure. Maybe they have to stop a villain who is stealing tech from both universes. Another could be a story where Reinhardt teams up with Thor. Their similar warrior - like personalities and love for combat could lead to a great story where they face a powerful magical foe together.
A great story idea could be a crossover where Mercy from Overwatch and Doctor Strange from Marvel meet. Mercy's healing abilities and Doctor Strange's magic could be combined in an interesting way. For example, they might need to heal a rift between the two universes that is causing chaos. Or, Widowmaker could cross paths with Black Widow. They could start as enemies, but then realize they have more in common than they thought and team up against a common enemy like Hydra or Talon.
One idea could be an Overwatch crossover with the Star Wars universe. Imagine Tracer using her time - traveling abilities in the middle of a lightsaber duel. Another could be a crossover with the Harry Potter world, like Pharah flying on her rocket launcher over Hogwarts. And a crossover with the Marvel universe, where Reinhardt teams up with Thor to fight some powerful villains.
Another great story could involve All Might and Captain America. Picture them meeting and sharing their ideals about heroism. They could train together and exchange combat techniques. Then, they face a threat that requires both their strength and leadership. For example, a new super - villain that has the powers of both the quirks from My Hero Academia and the super - powers from Marvel.
One great idea could be a story where Percy Jackson's world is in danger and Captain Marvel is somehow drawn into it. Maybe a powerful ancient Greek monster has powers that start to affect other dimensions, and Captain Marvel comes to help. She could use her super strength and energy blasts to fight alongside Percy and his friends against the monster. Percy, with his control over water, could also be useful in a fight, like creating a giant wave to distract the enemy while Captain Marvel attacks.
A crossover could involve the characters swapping abilities. Imagine Tracer from Overwatch having the ability to call in a Titan like in Titanfall 2. Or a Titanfall 2 pilot having the ability to use some of the support abilities of the Overwatch heroes, like Mercy's healing. This would create really interesting and unique combinations in combat scenarios.
A crossover with a cyberpunk - themed story could be really cool. Genji's cybernetic enhancements would fit right in. He could be on a mission in a dystopian city, facing off against powerful corporations and their enforcers. Along the way, he might meet new allies who are also fighting for justice in this harsh environment.
Another concept could be a story where a character from Halo, say Master Chief, gets transported to the Overwatch universe. He has to adapt to the different rules and powers there while trying to find a way back home. Along the way, he could form unexpected alliances with Overwatch heroes and learn about their world, and they could learn from his military discipline and combat experience.
Another interesting concept could be a crossover in which the technology from TF2 is integrated into the Overwatch universe, or vice versa. For example, the Medic's healing technology being used to enhance the Overwatch medics' abilities. This could lead to some really cool character interactions and story developments as they learn to work with new equipment and each other.
A great concept could be a crossover tournament. The two teams, TF2 and Overwatch, compete in a series of challenges. These challenges could include things like a sniper - only round where Widowmaker from Overwatch and Sniper from TF2 go head - to - head. Or a melee combat round with Reinhardt and the Demoman. It would be a chance to explore the different abilities and personalities of the characters in a competitive setting.
Maybe the villains from BNHA team up with some of the evil forces in the Overwatch world. Then the combined good guys, including both BNHA heroes and Overwatch agents, have to figure out how to defeat this new, dangerous alliance. It could lead to some really cool battles and character interactions, like All Might facing off against Doomfist.
One idea could be a crossover between the X - Men and the Avengers. Imagine Wolverine teaming up with Captain America in a battle against a common enemy like Ultron. Another could be a Spider - Man and Doctor Strange crossover, where Spider - Man's quick thinking and agility combine with Doctor Strange's magic to solve a multiverse - level threat.