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.
There could be a group of rogue shinobi who fear Kaguya's power and Naruto's influence on her. They might believe that having Kaguya in the world again, even if she is being 'raised' by Naruto, is a threat to their own plans for power and domination. So they try to stop Naruto and eliminate Kaguya.
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 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 Naruto discovers an orphaned child during one of his missions. He decides to take the child under his wing and raise it as his own. He would teach the child ninjutsu, just like Jiraiya taught him, and also instill in the child the values of hard work and loyalty.
Well, one possibility is that Goku, with his powerful Saiyan abilities and big heart, teaches Naruto new combat techniques. Maybe he shows Naruto how to better control his chakra by using some of the principles of Ki control in the Saiyan way. For example, Goku could help Naruto reach new levels of power in his Rasengan by adding elements of his Kamehameha's energy concentration.
One possible plot could be Naruto taking on the role of a mentor and father figure to Naruko. He might teach her all the ninja skills he has learned, like how to perform the Rasengan. And also, he could guide her in understanding the importance of friendship and loyalty, just as he experienced with his own friends in the original series.
In a 'naruto raises sarada fanfiction', perhaps Naruto discovers Sarada's potential early on. He starts by training her in basic ninja skills like chakra control. As she grows, he could involve her in more complex tasks within the village. Naruto might also help Sarada deal with the pressure of being the daughter of Sasuke and Sakura. He could encourage her to find her own identity as a ninja rather than just living in her parents' shadow. For example, Naruto could arrange for her to train with other young ninjas from different clans to broaden her perspective and skills.