A frequent theme in 'Hulk crossover fanfic' is redemption. If the Hulk has caused destruction in his own universe, crossing over might be a chance for him to redeem himself. In a crossover with the Fantastic Four, for instance, he could use his power for good in a different context. Also, the theme of adaptation is common. The Hulk has to adapt to new environments, new rules, and new allies or enemies when he crosses over. This can lead to some interesting character development as he learns to work with or against different characters.
Well, there's a 'Hulk crossover fanfic' that involves the X - Men. In this fic, the Hulk's uncontrollable power poses a unique challenge to the X - Men, who are used to dealing with mutants. The story could explore how they try to either contain or work with the Hulk. It also might have some interesting character dynamics, like Wolverine's no - nonsense attitude towards the Hulk and Professor X's attempts to understand his mind.
In a fanfic, it could be that the magic in the Harry Potter world has an unexpected effect on Hulk. For instance, the magic might make Hulk's transformations more controllable, or it could give him the ability to communicate better. And in return, Hulk's super strength and durability could be used to protect Hogwarts from various threats, like a giant dragon attack or an invasion of dark creatures. This way, both elements of the two universes blend well and create an exciting story.
The Scarlet Witch is a great candidate for a crossover with She - Hulk. Her reality - warping powers and She - Hulk's physical might could create some really unique storylines. Maybe Scarlet Witch accidentally warps reality in a way that affects She - Hulk's powers, and they have to work together to fix it. Also, Ant - Man could be fun. She - Hulk could be accidentally shrunk by one of Ant - Man's devices and they have to figure out how to reverse the process while also dealing with threats in the micro - world.
One idea could be that the Hulk somehow gets transported to the wizarding world. Maybe a magical experiment gone wrong by a Hogwarts student creates a portal. The Hulk's brute strength would be a shock to the wizards and witches. He could end up causing chaos in Hogwarts, knocking down walls and scaring students. Wizards would try to use spells on him, but his strength might make him resistant at first.
One idea could be that the World Breaker Hulk is accidentally transported to a parallel universe where he meets a group of powerful heroes. They initially see him as a threat but soon realize they need his brute strength to face a common enemy, a cosmic entity that is devouring planets. So, they form an uneasy alliance.
One possible plot could be that the Hulk is somehow transported to the DC universe and is initially seen as a threat by the Justice League. They might try to subdue him, but then realize he's not entirely a villain. Maybe there's a common enemy that forces them to team up. For example, a powerful alien force that is causing destruction in both the Marvel and DC universes. The Hulk's brute strength combined with the Justice League's diverse powers could make for an epic battle against this enemy.
Well, it could start with the Hulk being magically summoned to Hogwarts. He'd be confused by all the magic around him. The Hogwarts professors would be both fascinated and worried about this strange, incredibly strong being. They'd try to communicate with him, but the Hulk might just roar in response. Harry and his friends could be the ones to eventually make a connection with the Hulk, maybe by showing him kindness instead of fear.
Another concept could be a crossover with a character from a different universe, like a fantasy realm. Imagine the Hulk in a world full of magic and mythical creatures. It would be fascinating to see how he reacts to such an alien environment and how his powers might be affected or enhanced.
One possible storyline could be that Naruto is somehow transported to the Marvel universe and meets She - Hulk. They might initially be at odds due to their different worlds and ways of doing things. But then, they realize they can learn from each other. Naruto could teach She - Hulk about chakra and his ninja techniques, while She - Hulk could show Naruto the advanced technology and different superpowers in the Marvel world.