There might be. It's not uncommon for fanfiction to blend different universes. In such a fanfiction, the Justice League members, like Superman or Batman, could be watching Naruto and having various reactions. Superman might be impressed by the strong will of the ninja characters, while Batman could be analyzing their combat strategies. However, it may not be easy to find, but with a good search on relevant fanfiction platforms, you might get lucky.
The Justice League might be really surprised at the different powers in Naruto. For example, Naruto's ability to use chakra and perform jutsus could seem very strange to them. They could start comparing their own superpowers to those in Naruto's world.
They might be really surprised. Some of them could find it funny to see how fans imagine their adventures and relationships. For example, Superman might be amused by the creative ways fans write about his powers and his interactions with Lois Lane in the fan - made stories.
In a Naruto in Justice League fanfiction scenario, Naruto would have a lot to offer. He has a vast amount of chakra which could be used for various purposes like powering up the League's technology or creating barriers. His relationship with his teammates in Naruto like Sasuke and Sakura could be paralleled with the relationships in the Justice League. Naruto might have some initial cultural clashes with the League members as he comes from a different world, but over time, he would learn to adapt and they would learn from his unique skills and way of thinking. His Sage Mode would give him an edge in battles, allowing him to sense danger more acutely and react faster.
I think Flash himself would be really interested. After all, it's about him. He'd be curious to see how the writer of the fanfiction portrays his character, his powers, and his relationships with the other members of the Justice League.
They might be quite amused. The Justice League members, with their own complex backstories and powers, would see different interpretations of the Arrow universe in the fanfiction. Some might find it interesting to see how fans envision the crossovers or alternate storylines that could involve Arrow characters.
They might be quite surprised. Some members might find the different interpretations of magic and heroic concepts interesting, while others could be critical of how the Fate world's rules are applied in the fanfiction.
Well, it could be about the Justice League members sitting down and reacting to the Flash's adventures in the fanfiction. Maybe they laugh at his silly mistakes or are in awe of his heroic deeds in the made - up stories.
They might be shocked at the alternate versions of themselves and the events in the Injustice fanfiction. It could make them reflect on their own actions and relationships in their own universe.
They might have a range of reactions. Superman could be amused or a bit confused by some of the wilder interpretations of Batman. Wonder Woman might find it interesting to see how fans perceive the Dark Knight's world. Flash might laugh out loud at some of the more comical fanfictions.
No, there's no real evidence. It's just a concept that might have emerged from fans who are purists about Naruto's world. They might think that Naruto belongs only in his own ninja - themed story and not in the world of Justice League fanfiction. But it's not like there are any statements from the Naruto creators or the story itself to prove this 'hate' relationship.