Some fanfictions might explore a scenario where Itachi and Naruto have to go on a secret mission together. During this mission, they encounter various challenges that force them to rely on each other. Itachi's calm and calculated nature combined with Naruto's impulsiveness could lead to both comical and tense situations as they strive to complete the mission.
A plot could involve Itachi coming back to life and trying to make amends with Sasuke while also having to deal with Naruto's newfound power. Itachi sees the bond between Naruto and Sasuke and tries to help them strengthen it further for the sake of the Hidden Leaf Village. He could train them in some of his unique jutsu.
Perhaps Demon Naruto, in his altered state, initially clashes with Itachi. But as they come to understand each other's motives, they form an alliance. Itachi could help Naruto control his demon side while Naruto provides the brute force they need in battles against powerful enemies like the Akatsuki leaders who have their own sinister plans for the world.
A fanfiction could explore a scenario where Hidan is injured and Itachi has to take care of him. Itachi, being the more composed one, tries to keep Hidan in check while also learning about Hidan's unique immortality. This could lead to some interesting conversations between them about life, death, and their roles in their respective organizations.
One interesting Itachi x Naruto fanfiction could be about them teaming up on a special mission. In this story, Itachi's wisdom and Naruto's determination combine to overcome a powerful enemy that neither could face alone. Their relationship gradually evolves from mutual respect to a deep friendship throughout the mission.
There are fanfictions where Itachi survives his illness. He then decides to train Naruto privately. During this training, they develop a mutual respect that goes beyond just being comrades. Naruto learns about the Uchiha clan from Itachi, and Itachi gets to see Naruto's growth up close, leading to a strong and unexpected friendship.
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.
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.