A possible plot could be that Naruto is given a temporary Sharingan by an ancient Uchiha spirit. With this Sharingan, he starts to see the world in a different way, and he realizes that there are hidden threats in the ninja world that only the Sharingan can detect. He then embarks on a journey to find out more about these threats and how to stop them. Another plot could be that Naruto meets an Uchiha survivor who teaches him how to use the Sharingan in a way that no one else has thought of. This new way of using the Sharingan could help Naruto in his fight against the Akatsuki. And there could also be a plot where Naruto's Sharingan evolves in a unique way because of his Uzumaki heritage.
One idea could be a story where a character has both the Byakugan and Sharingan abilities due to some unique genetic experiment. This character could struggle with the dual powers, as the Byakugan's long - range vision and chakra point detection clashes with the Sharingan's ability to copy jutsu and predict movements. Another plot could involve a war where the knowledge of both the Byakugan and Sharingan is crucial for victory, and a young ninja must master both to save his village.
Another plot could be that the Sharingan is given to Naruto as a last - ditch effort to save the village. A dying Uchiha gives Naruto his Sharingan, and Naruto has to figure out how to incorporate it into his already powerful set of skills. He might have to deal with the jealousy or suspicion of some of his comrades who are wary of the Sharingan's power.
One plot idea could be that Naruto is on a mission and stumbles upon an ancient Uchiha artifact that somehow bestows the Sharingan upon him. He then has to quickly learn to control it while his friends are both amazed and a bit wary. Another could be that during a battle with an unknown enemy who has the power to transfer abilities, Naruto ends up with the Sharingan. This leads to him exploring the new abilities in unique ways, like combining Rasengan with Sharingan - enhanced perception.
Perhaps a story where Mikoto's Sharingan has a prophecy locked within it. Naruto, with his unwavering belief in changing destinies, helps Mikoto unlock this prophecy. It could be about a future that is both a threat and an opportunity for the ninja villages. Together, they have to figure out how to either prevent or embrace this future.
One idea could be that the character with the Sharingan is banished due to false accusations of using its power for evil. He then has to journey alone, facing challenges and learning to control his power in new ways. Maybe he meets a group of outcasts who he befriends and together they fight against the unjust system that banished him.
One idea could be a character from RWBY obtaining the Sharingan and using its abilities in combat. For example, Ruby could get the Sharingan and combine its precognitive abilities with her own speed, making her an even more formidable fighter.
One idea could be exploring a different origin for the Mangekyou Sharingan. For example, what if it was related to an ancient Uchiha pact with a hidden spirit? Another could be a story where a non - Uchiha character somehow gains the ability to use the Mangekyou Sharingan and has to deal with the consequences. Or perhaps a fanfiction where the Mangekyou Sharingan has additional powers that are not shown in the original Naruto series, like the ability to time - travel.
One idea could be a story where the main character, who has the Eternal Sharingan, has to face a new and powerful enemy that can manipulate time. With the power of the Eternal Sharingan, the character has to find a way to break the enemy's time - based attacks and defenses. Another plot could revolve around a character with the Eternal Sharingan trying to uncover long - lost secrets of the Uchiha clan that are hidden deep within the Sharingan's powers. Maybe there are ancient jutsu or prophecies that only the Eternal Sharingan can unlock.
One idea could be a story where Naruto somehow gains the Golden Sharingan. He could use its unique powers to see through genjutsu more easily and also have enhanced perception in battle. For example, he might be able to predict his opponents' moves better. Another plot could involve Naruto using the Golden Sharingan to unlock a new form of his Rasengan, perhaps one with the ability to disrupt an enemy's chakra flow on a deeper level. Or, it could be a story where Naruto has to team up with a character who has knowledge of the Sharingan to fully understand and control the Golden Sharingan's powers.
One idea is that an enemy targets Kakashi's Sharingan and Naruto has to protect it. Along the way, Naruto learns more about the Sharingan's capabilities and how to use it against the enemy. This would be a great opportunity for Naruto to grow as a ninja and for their friendship to deepen.