Perhaps Naruto's Six Paths Senjutsu gets corrupted by an ancient evil force. He then has to go on a journey to purify it. Along the way, he meets different spirits and sages who guide him on how to regain control over the technique. This journey could also lead to him unlocking new forms of the Six Paths Senjutsu that are even more powerful and less vulnerable to corruption.
One interesting plot idea could be Naruto exploring the full potential of the Six Paths Senjutsu in a new, uncharted dimension. He could discover hidden abilities that were previously unknown, like the power to manipulate time on a small scale while in that state. Another idea is that Naruto uses the Six Paths Senjutsu to communicate with past Hokages in a more profound way, learning ancient secrets that help him defeat a new, powerful enemy threatening the ninja world.
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.
Well, it could be about many things. Maybe it's about Naruto using the Six Paths Senjutsu in new and creative ways that the original story didn't show. It could involve him facing new enemies or having different adventures with this powerful ability.
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 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.
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.
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.
In this fanfiction, Naruto is bound to be a main character. Alongside him, there could be antagonists who are interested in the power of the Six Paths Senjutsu for their own evil purposes. These could be new villains or old foes with a new motivation. Also, characters like Jiraiya might make an appearance, either through flashbacks or some sort of spiritual guidance, as he was Naruto's mentor and had knowledge about various ninja arts, which could be related to the Six Paths Senjutsu in some way.
One plot idea could be that Naruto and Sasuke are sent back in time by the Sage of Six Paths to prevent a great disaster that is going to happen in the future. They have to work together to figure out how to change the course of events while also learning more about the Sage's powers and their own destinies.