In a fanfiction where Harry Potter is in the DC Universe, there are countless possibilities. He could introduce magic to the DC world on a large scale. Imagine him using the Patronus charm to protect Metropolis from Doomsday. His wand could be a unique weapon in a world full of superpowers. Also, his knowledge of the wizarding world could help in solving some of the DC Universe's mysteries, like ancient spells that could counteract certain super - powered threats.
If Harry Potter goes to the DC Universe in a fanfiction, it could be really interesting. His magical skills would be a new element in the DC world. He might be confused by the different powers and technologies there. For example, his invisibility cloak would be a different kind of 'invisibility' compared to the technology - based ones in DC. He could also learn a lot from the DC heroes about courage and justice, and in turn, teach them about the magic world.
He would probably be seen as a very powerful and unique being. His chakra abilities could be mistaken for some kind of meta - human power. Maybe he'd team up with the Justice League to fight against powerful threats like Darkseid. His skills in combat and his ability to use shadow clones would give the League an edge in battles.
He could fit in as a unique hero. His magic could be seen as a special power like the others in DC. For instance, he could use his Patronus charm to fight off fear - inducing villains.
If Harry Potter was in the Marvel Universe, he'd probably end up at Xavier's School for Gifted Youngsters. Think about it, a school full of mutants with special powers, and here comes Harry with his wizardry. He'd either be a great asset or cause a bit of a stir. His magical abilities would be a new kind of power that the X - Men and other mutants might not be used to dealing with.
Well, he could team up with Superman. Imagine Ben using his alien forms to help Superman fight Lex Luthor's latest evil plan. His alien powers would add a whole new dimension to the battles in the DC Universe.
Well, Naruto's unique ninja skills would be quite a shock in the DC Universe. His ability to create shadow clones could be used in various ways, like for stealth or for overloading opponents. He might team up with Batman, as Naruto has a strong sense of justice and could learn a lot from Batman's detective skills. And his Rasengan could be a powerful weapon against DC villains.
If Goku were in the DC Universe in a fanfiction, it would be really interesting. He might form an alliance with Superman. They both have a strong sense of justice. But their fighting styles are quite different. Goku's martial arts skills combined with Superman's super - powers could make for an unbeatable team against the likes of Darkseid or other major threats.
Well, he might use his magic to fight against the Sith. Maybe he could use the Patronus charm to fend off the dark side's influence. It would be really interesting to see how he'd interact with Jedi and their use of the Force.
Well, he might bring his magical skills into the world of vampires and werewolves. Maybe he'd use magic to deal with the complex relationships between the Cullens and the werewolf pack. He could also introduce new magical elements to the Twilight world, like potions to counteract vampire venom or spells to protect humans from vampire attacks.
If Harry Potter were in the Fullmetal Alchemist universe in fanfiction, it would be a really interesting crossover. Harry's skills in magic like apparition could be a huge advantage in getting around quickly in the Fullmetal Alchemist world. He could also try to teach the characters there about magic. On the other hand, he would have to adapt to the different culture and technology in that world. The alchemists might be both curious and skeptical about his magic. And he would have to deal with the political and ethical issues in the Fullmetal Alchemist universe, which are quite different from what he is used to in the wizarding world.