A cool plot could be that a time - travel device sends Naruto back in time to when the Sharingan was first created. He then has to navigate the politics and power struggles of that era, all while trying to figure out how to get back to his own time. Along the way, he gains a Sharingan - like power that he can take back with him to his own time to help protect the village.
Maybe in this fanfiction, Naruto discovers a hidden clan connection that gives him the Sharingan. This could lead to a story arc where he has to balance his Uzumaki heritage with this newfound Hatake - like ability. He might struggle with the different powers and how they interact with his existing jutsu.
One idea could be that Hatake Kakashi somehow transfers his Sharingan to Naruto in a dangerous mission. This would give Naruto new abilities and a whole new set of challenges to face. He'd have to learn to control the Sharingan quickly while also dealing with the enemies who might target him specifically for it.
One idea could be an OC Hatake who has a unique chakra ability. For example, they can manipulate ice in a way that's different from Haku. They could use this to create ice sculptures that come to life in battle. Another plot could involve the OC Hatake being a long - lost relative of Kakashi. This would bring in a lot of family - related drama and secrets to uncover. A third idea is that the OC Hatake has a special bond with animals, like being able to communicate with wolves, which is rare in the Naruto universe.
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.
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.
Another plot could involve a forbidden jutsu that combines the powers of these three ocular abilities. Maybe a hidden scroll is discovered that details how to perform this jutsu, but it comes with a great cost. The main character has to decide whether to pursue this power despite the risks, which could lead to internal conflict as well as conflict with other characters who oppose this dangerous path.
A really interesting plot could be that Naruto and Sasuke, as brothers, are on a quest to find the origin of the Sharingan. Along the way, they meet different characters who have different views on the Sharingan. Some see it as a curse, while others see it as a gift. This journey makes them question their own beliefs about power and family. As they get closer to the truth, they also face challenges from those who want to keep the origin of the Sharingan a secret.