The combination of powers. You get to see the superpowers of the X - Men, like Jean Grey's telekinesis and Cyclops' optic blasts, interact with the powers of the Avengers such as Thor's lightning and Captain America's super - strength. It makes for some really epic battle scenes.
The new storylines that can be created. A crossover allows for the exploration of new threats that neither group could handle alone. It could be a new super - villain who has a plan to take over the world using both mutant and non - mutant resources. This gives the writers a chance to be creative and take the story in unexpected directions.
The character dynamics are fascinating. For example, the relationship between Magneto and Tony Stark can be explored in many ways. Magneto's views on mutants and Stark's views on technology and heroism can clash or find common ground, which adds depth to the story. Also, the younger characters from both groups, like Kitty Pryde and Spider - Man, can have really cute and interesting interactions.
The mixing of different power sets. For example, Buffy's slayer strength and combat skills combined with Thor's god - like powers make for some epic fight scenes. It's fascinating to see how they would interact in a battle situation.
Storm and Thor could make a powerful duo. Both have control over powerful natural forces, Storm with the weather and Thor with lightning and thunder. Their powers could be combined in unique ways to take on powerful enemies. Also, they could have an interesting cultural exchange as Storm is from Africa and Thor is from Asgard.
Another plot could involve a misunderstanding between the two groups. Maybe some of the Avengers misunderstand the X - Men's mutant powers as a threat and start a conflict. But then they realize they were wrong and join forces to face a real villain who was secretly manipulating the situation. This would involve a lot of character development and relationship building among the different heroes.
Character development is another great aspect. In these crossovers, characters from both universes often have to step out of their comfort zones. Percy might have to deal with the more cut - throat and modern world of the Avengers, while the Avengers have to understand and accept the existence of magic and gods. This forces them to grow and change in new ways, which is always exciting to read about.
One great 'xmen and avengers crossover fanfic' is 'The United Front'. It has an exciting plot where the X - Men and the Avengers have to team up against a common enemy from another dimension. The character interactions are really well - written, especially the banter between Wolverine and Iron Man.
The most interesting part is the power combination. Naruto's jutsus like Rasengan and his ability to use chakra combined with the superpowers of the Avengers like Thor's lightning or Hulk's strength create really exciting battle scenes.
The character interactions. When different universes cross over, seeing how characters like Iron Man interact with, say, characters from the Star Wars universe (in some really creative crossovers) is fascinating.
The character interactions. When Brooklyn 99 characters cross over with others, it's always exciting to see how they'll get along. For instance, if they cross over with a show like 'New Girl', seeing Jake's detective skills contrasted with Jess's more whimsical nature can be really engaging.
The most interesting part is seeing how Izuku's character adapts to different universes. For example, in a crossover with the Naruto world, Izuku might learn chakra control, which is very different from his own quirk - based abilities. It's like seeing a fish out of water in a new and exciting environment.
In many 'thundercats crossover fanfic', the new storylines that emerge are really cool. When they cross over with something like the Guardians of the Galaxy, the Thundercats' sense of honor and the Guardians' more laid - back attitude create a contrast that leads to interesting adventures. Also, the way the fanfic writers combine the powers and abilities of both sets of characters is exciting.