I'm not sure if there is such a specific fanfiction. But if it exists, it might be a really wild crossover. Maybe Naruto somehow gets the powers of Thor from DC and has to use them in the Naruto universe. For example, he could use Mjolnir instead of his kunai and shuriken, and his Rasengan could be infused with lightning like Thor's powers.
A common theme is the clash of different power systems. Thor's godly powers from Asgard are very different from the powers of DC heroes. Fanfics often explore how these powers interact, like Thor's lightning against Superman's heat vision.
Definitely Marvel. Thor has been a key figure in Marvel comics for a long time. His adventures and storylines are all part of the Marvel comic universe's rich tapestry.
First, research both Naruto and Thor's universes thoroughly. Know their powers, personalities, and the rules of their worlds. For example, Naruto has chakra and Thor has Mjolnir. Then, come up with an interesting concept for their meeting, like a dimensional rift. Outline your story, including the beginning, middle, and end. Start writing, making sure to keep their voices true to the original characters.
I really like 'Naruto and Thor: The Crossover Quest'. In this fanfiction, Naruto is accidentally transported to Thor's realm. It's a great read as it shows Naruto's confusion and then his determination to adapt and find a way back home while also making friends with Thor. The action scenes are well - written, and the way their different cultures are blended is fascinating.
I also like 'Thor Among the DC Heroes'. In this story, Thor is kind of lost in the DC universe and has to find his way back home. Along the way, he meets various DC characters like Batman, and their interactions are very well - written. The author does a great job of showing how Thor's brashness contrasts with Batman's more calculated nature.
Naruto's chakra powers and Thor's godly powers could combine in interesting ways. For example, Naruto could use his chakra to enhance Thor's lightning attacks. Maybe when Thor throws Mjolnir, Naruto could add his own chakra boost to make it even more powerful and faster.
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.