Well, a plot could revolve around Itachi's spirit being able to communicate with the Kyuubi within Naruto. They could have philosophical discussions about power, sacrifice, and the future of the ninja world. And then, based on these discussions, Naruto could gain new insights on how to use the Kyuubi's power not just for fighting, but also for bringing peace. The Kyuubi might also be influenced by Itachi's selfless nature and become more cooperative with Naruto.
One idea could be that the Kyuubi's power somehow interacts with Itachi's Sharingan in a unique way. Maybe Itachi is able to use the Kyuubi's chakra to enhance his genjutsu even further. Another plot could involve Naruto, with the Kyuubi inside him, teaming up with Itachi to face a common enemy that neither could defeat alone. For example, a new powerful Otsutsuki clan member arrives, and their combined skills are needed to save the village.
One idea could be exploring the bond between Naruto and the Kyuubi in a new way. For example, they could have a shared dream where they are in a strange, alternate world and have to work together to find a way back. Another plot could involve Naruto using the Kyuubi's power to save a village from a new, powerful enemy that no one else can defeat. And a third could be about the Kyuubi revealing a long - lost secret about Naruto's family that changes his perspective on his own powers.
One idea could be that baby Naruto somehow crosses paths with Itachi in a secret mission. Maybe Itachi is on a mission in Konoha and stumbles upon baby Naruto who has an unusual chakra flare. Itachi, being curious, decides to keep an eye on him without revealing himself. This could lead to a series of events where Itachi's actions unknowingly protect Naruto from some early threats.
One idea could be that Itachi survives his battle with Sasuke and teams up with Naruto to face a new, powerful enemy from the Otsutsuki clan. They combine their unique skills, Naruto's Rasengan and Itachi's Sharingan abilities, to take on this threat.
A possible plot could involve Female Itachi being an outcast in her own clan because she has different ideals. Naruto, who always believes in people, befriends her. They then start a journey to prove that her ideas can bring peace to the ninja world, facing opposition from both their own and other clans.
One idea could be a story where baby Itachi meets a young Naruto in a sort of alternate universe. Maybe Naruto stumbles upon a hidden place where baby Itachi is being kept safe. They form an unlikely friendship, and Naruto's positive energy starts to influence Itachi in a way that makes him question some of the darker paths he might take in the future.
One idea could be exploring Itachi's time in ANBU and how Naruto might have influenced his decisions secretly. Maybe Naruto, with his unique way of seeing people, could have made Itachi question his path in the ANBU more deeply.
Maybe a fanfiction where Konan discovers a secret about Itachi that could change the way Naruto views him. This could lead to a complex web of relationships and a journey of self - discovery for Naruto as he tries to figure out who to trust. The story could also explore Konan's past more deeply in relation to this new discovery.
Maybe in the fanfiction, the Kyuubi has a soft spot for Hinata. Since Hinata is always so kind - hearted and gentle, the Kyuubi starts to protect her in its own way. This could create some interesting situations, like when Naruto is in danger, the Kyuubi takes over not just to save Naruto but also because it doesn't want Hinata to be sad. It would be a different take on the relationship between the three.
One plot idea could be that Naruto and Kyuubi have to work together to stop an ancient evil that is threatening the ninja world. This would require them to fully trust each other and combine their powers in new and unique ways.
One idea could be Naruto exploring the ancient powers of the Kyuubi that were long forgotten. He could discover hidden techniques that only the Kyuubi knew in its long existence.