Perhaps a plot where the villains in the 'My Hero Academia' world are trying to steal Naruto's chakra for some evil plan. This would lead to Naruto teaming up with the heroes of that world to stop them. He could show them his never - give - up attitude and inspire them in the process.
One idea could be Naruto suddenly finding himself in a world similar to 'My Hero Academia' and having to adapt to their different power systems. He might start teaching his ninja skills to the students there, creating a whole new dynamic.
One idea could be a time - travel plot where a character from the future goes back to the Naruto Hero Z era to change a major event. This could lead to all sorts of new alliances and rivalries.
One plot idea could be Naruto being betrayed by the Hidden Leaf Village. He then decides to use his powers for his own gain rather than for the village. He might form his own group of outcasts and fight against the village's corrupt leadership.
Well, you could do a fanfiction where Naruto teams up with villains from the series. Maybe he has to work with Orochimaru to stop a greater evil that threatens the entire ninja world. It would be a really interesting dynamic as Naruto has always been against Orochimaru. Or, how about a story where Naruto discovers a long - lost clan related to his Uzumaki heritage and has to learn their special techniques to save Konoha from a mysterious threat.
A cool plot could involve the sharing of techniques. Sasuke might teach Bakugo some of his sword skills, while Bakugo shows Sasuke how to better control his explosive power without overusing it. Also, the concept of the Ninja Academy in Naruto could be merged with UA High. Students from both could participate in a joint training session where they learn from each other's combat styles and strategies.
One idea could be that Naruto characters are transported to the My Hero Academia world and have to adapt to the different power system. For example, Naruto might be confused by the concept of Quirks at first but then find similarities to chakra. Another could be a training session where Deku and Naruto train together, with Naruto teaching Deku about his never - give - up attitude.
One idea could be Naruto somehow ending up in the My Hero Academia world and using his ninja skills in a vigilante way. For example, he might use his shadow clone jutsu to create distractions during villain attacks, which is a completely new concept in the MHA universe.
Another idea is a fanfiction where the quirks in Boku no Hero are somehow combined with the chakra system in Naruto. Maybe a character has a quirk that allows them to manipulate chakra in unique ways. This could lead to all sorts of new abilities and storylines.
One idea could be a crossover where Naruto characters gain the powers of DxD characters. For example, Naruto could get the power of Issei's Boosted Gear and use it in combination with his own chakra powers. This would create some really cool battle scenes and new power - up scenarios.
How about a fanfiction where the villains and heroes have to team up? There could be a greater threat, like an alien invasion or a powerful quirk - user who is out to destroy the entire world. The heroes and villains realize that they can't defeat this threat alone, so they put aside their differences. This would lead to some really interesting character interactions, like Bakugo having to work with Shigaraki and both of them learning to respect each other's skills despite their opposing natures.
One idea could be that the events of 9/11 somehow influence the Hidden Leaf Village. For example, they might tighten security and Naruto could be part of a new team in charge of protecting the village from potential outside threats inspired by the real - world event. Another plot could involve characters from Naruto trying to understand the concept of such a large - scale tragedy and how they can prevent similar things in their own world.