The plot could involve the immortal teacher passing on ancient and powerful jutsu to Naruto. For example, the teacher might know a unique form of chakra control that Naruto can use to enhance his Rasengan. This new knowledge could make Naruto stand out even more in battles against strong opponents like Sasuke or the Akatsuki members.
Perhaps the immortal teacher has a hidden agenda. He could be from a long - lost clan that wants to use Naruto to regain their former glory. So, while teaching Naruto, he's also subtly guiding him towards certain goals that benefit the clan. This would create a lot of internal conflict for Naruto as he tries to balance his own dreams with the teacher's expectations.
One possible plot could be that Naruto's kid discovers their own unique ninja abilities. Maybe they struggle at first to live up to Naruto's legacy but then find their own path. For example, they might be more interested in healing jutsu rather than combat like Naruto was.
One possible plot could be that Naruto discovers the nanites in his body accidentally. They might enhance his abilities like his chakra control or give him new powers. For example, the nanites could help him to better manipulate his shadow clones, making them more efficient in battle.
Well, one possible plot could be that Naruto discovers the Master Sword in a hidden realm during one of his training journeys. The sword might have some special powers that Naruto has to learn to control. Maybe it can enhance his Rasengan or give him new jutsu abilities. He then has to face new enemies who are after the sword's power.
In this fanfic, the plot might also revolve around the relationships the child forms. They could have a special bond with Naruto's old friends like Sasuke and Sakura. The child might also struggle with the expectations placed on them by the village, as everyone would expect great things from the child of Naruto and Kurenai. This could lead to an internal conflict within the child as they try to find their own identity.
Well, the plot could involve Naruto using his cat ears to enhance his senses in battles. Maybe he discovers he has these cat ears one day out of the blue and at first is confused but then realizes it gives him an edge in detecting hidden enemies or finding things. For example, he could use his new - found acute hearing to overhear secret plans of the villains.
One possible plot could be the daughter growing up in a post - war Konoha. She might struggle with the high expectations placed on her as the child of Naruto, the Hokage, and Hinata of the Hyuga clan. Maybe she discovers a new ninja technique that is unique to her and has to prove herself to her peers and family.
In a fanfic about Naruto having hollow powers, the plot could revolve around the idea of Naruto accidentally awakening these powers during a particularly intense battle. These powers could initially be uncontrollable, causing chaos. Naruto would then have to train hard to master them. He might find that his hollow powers give him a new form, like a transformation similar to the Nine - Tails mode. This new form could have unique abilities that he could use to protect his village and friends, and also to explore new regions and face new threats that normal ninja techniques couldn't handle.
Jiraiya could be a candidate if he were somehow made immortal. He already has a deep connection with Naruto and has taught him a great deal. His knowledge of Sage Mode and other jutsu could be further expanded if he were immortal, and he could continue to guide Naruto for a much longer time.
One possibility is that Naruto gains new powers. With Nagato's eyes, he might be able to use the Rinnegan abilities in unique ways. For example, he could master the Six Paths techniques more quickly. Another aspect could be the change in his relationships. His friends might be both in awe and a bit wary of his new power. And he would have to learn to control these new abilities to avoid being consumed by the power of the Nagato eyes.
The plot could revolve around the daughter's journey to discover her place in the ninja world. She could start off as a bit of a misfit in the ninja academy, not quite fitting in with the other kids. As she grows, she realizes that she has a unique ability to sense the emotions of others, which she got from Naruto's empathetic nature and Sakura's ability to understand her patients. This power helps her make friends and also helps her in her missions. She then embarks on a quest to learn more about this power and how to use it for good, all while dealing with the expectations of being Naruto and Sakura's daughter.