One idea could be a story where Sasuke, with his Sharingan, discovers a new power related to the Rinnegan that was hidden within Naruto all along. Maybe Naruto has some dormant Sage of Six Paths energy that when combined with Sasuke's powers, they can unlock a new level of strength to fight a powerful, unknown enemy.
A cool plot could be that a new villain emerges who has the ability to nullify the powers of the Sharingan and Rinnegan. Naruto and Sasuke have to find a way to overcome this without relying solely on their eye powers. They might discover ancient techniques that their predecessors used before the existence of these eye powers.
Well, it really depends on how the fanfiction is written. But generally, the Rinnegan has extremely powerful abilities like the Six Paths powers. However, the Sharingan also has its own set of formidable skills such as predicting movements and copying jutsu. If Naruto with the Rinnegan can utilize the full potential of its powers like the ability to absorb and repel ninjutsu, he might have an edge. But Sasuke's Sharingan could potentially counter with its speed and precision in combat.
One possible fanfiction could be about a character who has the unique ability to combine the powers of the Sharingan, Rinnegan, and Byakugan. For example, this character might be a long - lost descendant of powerful ninja clans. They could use the Sharingan's precognitive abilities to anticipate an enemy's moves, the Rinnegan's power over life and death in battles, and the Byakugan's long - range vision to scout out the battlefield. This would make them an extremely formidable foe in the Naruto universe.
A fanfiction could focus on how the three eye - powers interact. For instance, the Sharingan's ability to copy jutsu could be combined with the Rinnegan's ability to create new jutsu. The Byakugan's vision could help in aiming and strategizing. A story could be about a group of ninjas from different clans who come together, each with one of these eye - powers, to face a common enemy. They must learn to work together and combine their powers effectively. This would involve exploring the strengths and weaknesses of each eye - power and how they can complement each other.
Perhaps in a fanfiction, there could be a group of ninjas who all have different levels of Rinnegan and Sharingan abilities. They form a team and use their combined powers to take on a powerful enemy that threatens the entire Naruto world. Each member has to learn to trust and rely on the others, while also mastering their own unique eye - power combinations.
The Rinnegan in fanfiction can often be seen as a power that gives the user a god - like status. It has abilities like the Six Paths techniques. The Sharingan, on the other hand, is more about perception and copying techniques. And the Byakugan provides a near - 360 - degree field of vision. In a fanfiction, a character might struggle to balance the different aspects of these powers if they were to possess all three.
In fanfiction, the Rinnegan is often depicted as more powerful than the Sharingan in many ways. The Rinnegan has abilities like the Six Paths techniques which can be extremely overpowered. For example, it can allow the user to control gravity, summon large creatures, and even revive the dead. While the Sharingan has its own set of cool abilities like predicting movements and casting genjutsu, it seems limited in comparison when it comes to the grand scale of power shown by the Rinnegan in most fanfictions.
A plot development might involve Naruto struggling to control the Rinnegan at first. Sasuke, noticing this, believes he can defeat Naruto easily with his Sharingan. But as Naruto starts to master the Rinnegan, he shows new abilities that shock Sasuke. This could lead to a situation where they have to team up against a common enemy who is after the power of both the Rinnegan and the Sharingan. Or perhaps a prophecy is revealed that states only one of them can keep their dojutsu power and they must fight to decide who keeps it, leading to a moral and power - based struggle.
In this fanfiction concept, Naruto and Sasuke as brothers could lead to a very different Naruto universe. With Sasuke having the Sharingan, he could potentially use it to protect Naruto more often. Maybe they would train together in new ways, combining Sasuke's Sharingan - related jutsu with Naruto's Uzumaki power. For example, Sasuke could use his Sharingan to analyze Naruto's chakra flow and help him master new forms of the Rasengan faster.