In a fanfic crossover, we could see Tadashi from Big Hero 6 and Elsa having a conversation about their responsibilities. Tadashi was responsible for Hiro and his growth, and Elsa is responsible for Arendelle. They could share their experiences of feeling the weight of their duties and how they overcame their insecurities to fulfill them. This could be a really deep and emotional part of the crossover story.
One interesting crossover could be where the characters from Big Hero 6 visit the Naruto world. Hiro could use his tech skills to help out in battles, like creating new types of ninja tools. Baymax could be there to heal the injured ninjas. Another idea is that Naruto characters go to the world of Big Hero 6. Naruto might be amazed by all the high - tech stuff there.
Well, a great crossover idea in these fanfics is the concept of the characters' songs. For example, Elsa's 'Let It Go' and Belle's 'Beauty and the Beast' song. Imagine if the two stories collided and there was a moment where both characters sang their iconic songs in a combined musical number. It would be a very emotional and powerful moment. Also, the idea of the dwarfs from Snow White (since Frozen and Beauty and the Beast are both Disney) helping out in the Beast's castle could be really fun. They could add some comical relief to the more serious situations in the story.
A cool crossover in the fanfiction could be that some of the spells from Harry Potter are used in the Big Hero 6 world. Like the invisibility cloak could be something that the Big Hero 6 team tries to replicate using their technology. Or the characters from Big Hero 6 could help the Harry Potter crew in a battle using their advanced robotics and inventions.
One interesting crossover could be the tech sharing between Hiro from Big Hero 6 and Iron Man. Hiro might learn some advanced Stark Industries tech, which could enhance Baymax's capabilities. For example, adding more combat functions to Baymax.
One interesting crossover could be Naruto learning about Baymax's medical technology. It would be cool to see Naruto's reaction to such advanced non - chakra - based healing methods.
One interesting crossover could be the characters swapping their powers. For example, Deku having Naruto's chakra and being able to perform jutsus. It would be really cool to see how he would use them in the My Hero Academia world. Another could be the heroes and ninjas teaming up to fight a common enemy. Maybe the League of Villains and some of the Akatsuki members joining forces, and then the heroes and ninjas having to combine their skills to defeat them.
One interesting crossover could be the Quirks from 'My Hero Academia' interacting with the superpowers in the Marvel Universe. For example, imagine Deku's One For All Quirk combined with the powers of Spider - Man. He could swing from building to building with his web - like attacks while still having the raw strength of One For All.
Well, in some fanfiction, we might see Anna and Kristoff visiting Hogwarts. They could be amazed by the moving staircases and magical creatures. In reverse, Harry, Ron and Hermione could end up in Arendelle. Hermione might be intrigued by the way Elsa controls her ice powers and try to find a scientific or magical explanation for it. Also, the Dementors from Harry Potter could be compared to the dark forces in Frozen 2, like the mist that Elsa has to face.
One interesting crossover could be a scenario where Hermione uses her magic to help Elsa control her powers better. Maybe she creates a spell that can soothe Elsa when she's about to lose control.
One interesting crossover could be Elsa using her ice powers in the Hunger Games arena. She could create ice barriers for protection or freeze her opponents' weapons. Another could be Anna's fearless nature helping her navigate the deadly Hunger Games, forming alliances with other tributes. Maybe characters from Frozen could interact with the Capitol, like Elsa impressing them with her powers during an interview.