Well, it could involve Naruto having some unique powers inherited from Kaguya. Maybe he discovers his true lineage gradually and has to deal with the expectations and the secrets that come with it. He might face new enemies who are interested in his connection to Kaguya, or he could use his new - found heritage to bring about a new era of peace in the ninja world.
The plot might involve Naruto learning about his heritage as Kaguya's son. This could lead to a whole new understanding of the ninja world for him. He might face discrimination from some who fear his power, while others see him as a potential savior. He could also have to unlock the secrets of Kaguya's power within himself to face a great threat.
One possible plot could be that the reader is a new ninja in the Naruto world. They accidentally stumble upon Kaguya's hidden lair. Kaguya, instead of seeing the reader as a threat, is intrigued by this new presence. She decides to test the reader's skills and knowledge. The reader, in turn, has to use their wits and any ninja techniques they've learned to survive and perhaps even gain Kaguya's respect.
Well, one possibility could be that Naruto, with his Saiyan powers (assuming some sort of crossover mechanic), has to deal with Kaguya in a new way. Maybe he forms a harem that includes characters related to Kaguya's story. The plot could involve battles against new threats while also exploring the relationships within the harem.
One possible plot could be a crossover where a Saiyan somehow ends up in the Naruto universe during the time of Kaguya. Maybe the Saiyan's power is sensed by Kaguya and she sees it as a threat or an opportunity. The Saiyan, with their battle - hardened nature, could get involved in the Naruto characters' fight against Kaguya, adding a new dimension of power and strategy to the battle.
Well, the plot could involve Naruto discovering his heritage as the descendant of Kaguya's third son. This might lead to new powers emerging within him. Maybe he has some unique abilities related to Kaguya's lineage that no one has seen before. It could also create a new conflict as other forces might either fear or want to use his newfound connection for their own gain.
The plot could involve Naruto delving into the history of his family and Kaguya's past. He could learn secrets that were long buried, and this knowledge could be used to either save the ninja world from a new threat or to bridge the gap between different ninja clans that have been at odds because of Kaguya's actions in the past. Naruto's new status as Kaguya's brother could be a catalyst for great change in the Naruto universe.
Well, it could be that Naruto is in a near - death situation, poisoned or severely injured. Kaguya, having a change of heart, decides to save him. She might use her chakra to heal Naruto's wounds and restore his strength. It could also be that Kaguya saves Naruto from a trap set by an ancient evil that she has knowledge of. She steps in because she realizes Naruto's importance in the balance of the ninja world.
One possible plot could be that Naruto, in his godlike state, tries to understand Kaguya's past and motives more deeply. He might use his newfound power to communicate with her on a different level, perhaps even showing her a different way of seeing the world. This could lead to a redemption arc for Kaguya, where she starts to regret her past actions.
In this fanfiction, perhaps Naruto breaks Kaguya by outsmarting her. He could use his quick thinking and knowledge of her weaknesses. He might form alliances with other characters in ways that give him an edge over Kaguya, and then use his signature Rasengan in a new and unexpected way to break her power.
The plot could also involve Naruto raising Kaguya to be a force for good in a world that still has remnants of evil. Kaguya, with Naruto's guidance, could use her vast power to help in rebuilding areas damaged by past wars. Naruto may also introduce her to the concept of family, which she may have lost touch with long ago, and this new understanding could transform her character completely.