One interesting crossover could be Naruto learning some of the X - Men's powers. For example, he might gain the ability to control magnetism like Magneto and use it in combination with his own chakra control for unique attacks.
Well, a cool aspect in such a fanfic could be the interaction between Naruto's ninja world and the mutant - human relations in the X - Men world. Maybe the X - Men come to the ninja world and have to adapt to the different combat styles and social structures there. They could teach the ninjas about mutant acceptance and in return, the ninjas could teach them some stealth and assassination techniques that are unique to their world.
In an Avatar x Naruto fanfic, there could be a plot where the Avatar is reincarnated into the Naruto world. The Avatar would have to learn about chakra and ninjutsu while also trying to keep their bending abilities a secret. They could form unique bonds with Naruto characters. For instance, they might team up with Sasuke to explore the similarities between the Uchiha's Sharingan and the Avatar's connection to past lives. Or they could help Sakura with her medical ninjutsu by using their knowledge of herbs and healing from the Avatar world.
One of the most exciting crossovers is when the Phoenix from the X - Men universe gets linked to the magic in the Harry Potter world. It creates a really complex and engaging plot as the power of the Phoenix is explored within the context of magic, spells, and wizardry.
Another interesting crossover is when Magneto's control over metal meets the magical objects in the Harry Potter universe. For instance, he could potentially manipulate the swords of Gryffindor or the various metal - made potions equipment. This creates a whole new dynamic as the wizards have to deal with a power they've never encountered before, and Magneto has to understand the rules of magic that govern these objects.
Well, in a crossover fanfiction, the X - Men could be transported to the world of Frozen. Kitty Pryde could phase through Elsa's ice walls, which would be really cool. Magneto could also play a role. If he somehow ended up in Arendelle, he might try to take over the place using his magnetic powers. But the people of Arendelle, along with the X - Men, would have to stop him. It would be a story full of action and adventure, with the unique powers of the X - Men mixing with the charm of Frozen.
In a Naruto x Attack on Titan fanfic, there could be a situation where the ninjas are brought into the world of Attack on Titan. Naruto himself could use his rasengan against Titans, which would be a very powerful weapon. The characters from Attack on Titan might be intrigued by the ninja's ability to use chakra and try to learn from them. This could lead to a new kind of training regime within the walls, where they combine their existing combat skills with the newfound chakra - based techniques.
Another aspect could be the cultural differences between the two universes. Naruto comes from a more traditional Japanese - inspired world, while Highschool DxD has a more modern, supernatural - focused world. Fanfics might explore how the characters deal with these differences, like Naruto introducing his values of hard work and friendship to the more power - hungry characters in Highschool DxD.
The idea of Naruto using his shadow clone jutsu in the Matrix world is really interesting. He could send out clones to explore different areas of the Matrix, which is a different approach compared to how Neo and others operate.
One interesting crossover could be the X - Men characters in the world of Westeros. For example, Magneto could use his powers to manipulate the iron in the weapons and armors of the various factions in Game of Thrones. He might side with a particular house, perhaps seeing an opportunity to gain power or protect mutants in this new and different world. Wolverine's healing factor and combat skills would make him a formidable fighter in the battles of Westeros. He could find himself involved in the power struggles, similar to how he gets involved in various conflicts in the X - Men universe.
In some fanfictions, there could be a crossover where Spider - Man gets caught in a time - travel experiment by the X - Men. He ends up in a past era with the early X - Men. There, he has to use his modern - day knowledge and skills to help them against a powerful foe. It could also be a crossover where the X - Men visit Spider - Man's world in Queens and learn about his normal life as Peter Parker, while also helping him fight local villains.
One interesting crossover could be the idea of Hogwarts students having mutant abilities. For example, a student who can control the weather like Storm from X - Men. It would create a whole new dynamic within the Hogwarts environment, with new challenges and friendships.