In a Six Paths Naruto crossover fanfiction, a great plot could be Naruto being sent to a post - apocalyptic world. He would have to use his powers to help survivors and fight against mutated creatures. The survivors might initially be scared of him, thinking he's some kind of new threat. But as they see him fighting for them, they start to trust him. Naruto could also find a way to bring hope back to this desolate world by using his Six Paths powers to start rebuilding and restoring nature.
One idea could be Naruto from the Six Paths Sage mode getting crossed over into a modern-day world. He could use his powers to fight against new types of villains like super - powered criminals. Another plot could involve a crossover with a different anime universe, like Naruto meeting characters from One Piece and having to team up to stop a common threat that endangers both their worlds. Maybe a powerful ancient evil that has the ability to disrupt the balance of chakra in Naruto's world and the Devil Fruits' power in One Piece's world.
A cool plot could be a crossover where Naruto in his Six Paths form enters a world full of magic, like the Harry Potter universe. He might have to learn how to adapt his chakra - based powers to work with magic. For example, using his Rasengan in combination with a spell. Or perhaps there's a dark wizard who wants to steal Naruto's chakra for his own evil purposes. This would lead to some epic battles between Naruto and the wizarding world's dark forces.
One idea could be Naruto traveling to a different universe where the Sage of Six Paths is still alive and they team up to face a new, powerful enemy. Another could be a fusion of their powers in a strange way due to a magical artifact in the crossover world. Maybe Naruto gets to learn new jutsu directly from the Sage in a more in - depth way than he did in the original story.
One interesting plot could be exploring how Naruto's new powers from the Six Paths change his relationships. For example, how does he interact with Sasuke now that he has such god - like abilities? Maybe he becomes more of a mentor figure to the younger generation in the village.
One idea could be that Naruto, with the power of the Sage of the Six Paths, gets transported to a different ninja world. There, he has to team up with new and strange characters to fight against an evil force that is threatening both worlds. Maybe this new world has different chakra rules and Naruto has to adapt quickly.
One interesting plot could be about Naruto exploring more of the Sage of Six Paths' untold teachings. For example, he discovers a new jutsu that was lost in time but was once known to the Sage. This could lead to him becoming even more powerful and facing new threats in the ninja world.
One idea could be exploring the backstories of each of the Six Paths of Pain in more detail. Maybe show how Nagato came to choose them and what their lives were like before being made into his powerful tools. Another plot could be a scenario where a character tries to redeem the Six Paths of Pain instead of simply fighting them. This could involve a deep understanding of their pain and the reasons behind Nagato's actions.
One idea could be exploring the training of Naruto by the Sage of the Six Paths in more detail. Maybe the Sage could teach him some long - lost jutsu. Another idea is to have Naruto travel back in time to the era of the Sage and witness the creation of ninjutsu first - hand.
Another idea is that the Six Paths power in fanfiction could have unforeseen side effects on Naruto. He could start to have visions of the past Sage of Six Paths' life in more detail, and these visions could either guide him or mislead him. This would add a new layer of mystery and internal conflict to Naruto's character as he tries to figure out what these visions mean and how to use the power without being consumed by it.
One idea could be Naruto having to face an ancient evil that threatens to disrupt the balance between the six paths and the avatar world. He might have to learn new jutsu inspired by the avatar elements. Another could be Naruto forming an alliance with avatar characters to fight a common foe, like a powerful dark spirit that can cross between their universes.
Perhaps a plot where Naruto has to teach the Sage of Six Paths Senjutsu to a new generation of ninjas. This could involve dealing with their different learning abilities and personalities, and also facing threats from those who want to misuse this powerful technique. It could also show how Naruto has grown as a teacher and a leader.
One idea could be Naruto traveling back in time to prevent the Uchiha massacre. He could use his Six Paths powers to change the course of events. Another could be him going back to the time of the Sage of Six Paths to learn more about his powers from the source.