There's also 'X - Men and the Fantastic Four: A Mutant Alliance'. In this fanfiction, the X - Men team up with the Fantastic Four. It delves into how the two groups, with their different powers and personalities, work together. There are some really fun moments as they try to figure out how to combine their abilities to face various threats.
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.
One common theme is the exploration of power dynamics. When the X - Men cross over with other groups, like the Avengers or the Fantastic Four, there's always a comparison and contrast of their powers. For example, in a crossover with the Avengers, the mutants' powers might be seen as more unpredictable compared to the technology - based powers of some Avengers.
There's a fanfic called 'Rogue's Bold Move'. In this story, Rogue decides to break away from the X - Men for a while to explore her own potential. She gets into all sorts of dangerous situations and comes out on top every time. It's really exciting to see her be so fearless. Another interesting one is 'Rogue: Unleashed'. Here, Rogue's powers are pushed to the limit, and she has to use her wits and badass attitude to survive in a world that's out to get her.
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.
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.
One popular 'hitman crossover fanfiction' could be the ones where Hitman crosses over with Assassin's Creed. In these, you often see the two different assassin - like characters interact, with their unique skills and moral compasses clashing or aligning in interesting ways.
There's a 'felicity crossover fanfiction' called 'Felicity Meets the Legends'. In this one, Felicity somehow gets involved with the Legends of Tomorrow crew. It's interesting to see how her character interacts with the time - traveling misfits. Her logical thinking clashes and also blends well with their more chaotic ways.
One interesting arcane crossover fanfiction is 'Arcane Meets Harry Potter'. It creates a really unique scenario where characters from Arcane enter the magical world of Harry Potter. The author does a wonderful job of blending the different magical elements and cultures from both universes. It's full of unexpected twists and turns as the characters from Arcane adapt to the new and strange world of Hogwarts and the wizarding community.
There's also 'Mentalist and Supernatural Crossover'. This fanfic brings in elements from 'Supernatural'. It has the characters from 'The Mentalist' getting involved in a case that has a supernatural twist, which makes for an exciting read as they try to figure out things beyond the normal realm of crime - solving.
One great 'the incredibles crossover fanfiction' is the one where they cross over with the 'Big Hero 6'. It's really interesting to see the Incredibles' superpowers interact with Baymax and the gang's high - tech gadgets.