A cool Big Hero 6 crossover fanfiction idea might involve crossing over with the DC Universe. Hiro could meet Batman and learn about his detective skills and use of gadgets. Baymax could interact with Superman, which would be an interesting contrast of a big, strong hero and a soft, caring robot. Or perhaps a crossover with the Powerpuff Girls. The girls' superpowers combined with the tech - savvy of Big Hero 6 could lead to some really fun and action - packed adventures.
For a Big Hero 6 crossover fanfiction, consider a crossover with Star Wars. The Big Hero 6 crew could find themselves on a planet in the Star Wars universe. Hiro might be fascinated by the droids there and try to incorporate some of their features into Baymax. They could also cross paths with the Jedi and help them in a battle against the Sith. Another idea is a crossover with How to Train Your Dragon. The team could visit Berk and use their technology to enhance the Vikings' dragon - riding capabilities.
Well, you could write a Big Hero Six fanfiction where Baymax develops some new emotions or abilities. Maybe he starts to understand humor in a more complex way. Or a story that focuses on the friendship between Hiro and Wasabi, showing how they support each other during tough times. Also, a fanfic where the team has to operate in a different city or country, dealing with new cultures and challenges.
An interesting OC for Big Hero 6 fanfiction could be a time - traveler. This OC accidentally lands in San Fransokyo during the time of Big Hero 6. They have knowledge of future events which could either be a great help or cause some major problems. For example, they might know about an upcoming big threat but their attempts to prevent it might accidentally set off a chain of events that make the situation worse. The OC would have to work with the team to fix things while also dealing with the fact that they are out of their own time.
A great crossover idea is with the Dragon Ball series. The powerful Saiyans could interact with the My Hero Academia characters. Goku could train the students at UA to reach new levels of power. Also, a crossover with the Attack on Titan world would be intense. The heroes would have to deal with Titans in a whole new way and use their quirks in that battle - filled environment.
One idea could be exploring the backstory of Tadashi more deeply. Maybe how he came up with the idea for Baymax in the first place.
A cool My Hero Academia crossover fanfiction idea would be with the Avengers. The heroes from UA could team up with the Avengers to fight a common enemy. For example, a powerful villain who can absorb quirks and powers. It would be interesting to see how characters like All Might and Captain America interact, and how their leadership styles differ.
Perhaps an OC who has a special power related to nature in a world full of high - tech. They could struggle to fit in at first but then find ways to combine their natural abilities with the tech - savvy of the Big Hero 6 team. For example, using plants to enhance communication devices or something like that.
One idea could be a crossover with 'Star Trek'. The characters from 'The Big Bang Theory' could find themselves on the Enterprise, with Sheldon trying to understand the advanced technology there. Another idea is a crossover with 'Doctor Who'. The Doctor could arrive in Pasadena and interact with the gang, leading to some hilarious scientific debates. And perhaps a crossover with 'Futurama', where the two groups of characters explore different time periods and universes together.
One idea could be that a character from another universe gets transported into the BioShock world and has to team up with a Big Daddy. Maybe they start off as enemies, but as they face common threats like the Splicers, they form an unlikely alliance. The Big Daddy could protect the new character while they figure out how to get back to their own world.
One idea could be to cross the Beetleborgs with the Power Rangers. The Beetleborgs could find themselves in the Power Rangers' world and have to team up to fight a common enemy. They could learn new fighting techniques from each other and combine their powers in unique ways.
Maybe a crossover with a post - apocalyptic world. Big Boss enters a world like that of The Walking Dead. He has to use his survival and combat skills in a completely different scenario. He could form an alliance with some of the survivors there, teaching them his ways of combat and in return, learning about their unique ways of surviving in a world full of zombies. It would be a great mix of two different universes.