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 fanfiction, the idea of Naruto having the Sharingan and Rinnegan is often a creative and out - of - the - box concept. It could be due to some kind of powerful jutsu or a unique plot device. Maybe a powerful enemy uses a forbidden jutsu that somehow transfers the powers to Naruto. Another possibility is that in an alternate universe created by the fanfic writer, the rules of chakra and kekkei genkai are different, allowing Naruto to possess these powers.
One potential plotline could be Naruto using his new powers to finally bring true peace to the ninja world. He could use the Sharingan to understand the root causes of conflicts by seeing through people's true intentions and the Rinnegan to reshape the world in a more harmonious way.
An interesting plot could be that Naruto, with his new eyes, discovers a hidden conspiracy in the ninja world that was related to the origin of the Rinnegan and Sharingan. He has to use both his powers to uncover the truth and stop those behind it. For example, he might find out that there is a group that wants to control all the powerful ocular jutsu in the world. With the Sharingan, he can detect their lies and with the Rinnegan, he can take on their powerful minions. Also, he could use the powers to communicate with ancient ninja spirits and gain their wisdom to solve current problems.
One possible plot development could be that Naruto gains a whole new level of power and is able to see and understand the world in a different way. He might be able to use the Rinnegan's abilities to finally bring true peace to the ninja world. For example, he could use the power of the Rinnegan to better understand the motives of his enemies and find non - violent solutions to conflicts.
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.
In the 'naruto has no eyes fanfiction', the plot might involve Naruto discovering a new form of chakra that is unique to his condition. This new chakra could give him abilities that he didn't have before, like the ability to sense the emotions of his opponents. There could also be a plot twist where Naruto's blindness is actually a part of a greater prophecy, and he has to fulfill it in a way that no one expected.
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.
Yes, there are likely some Naruto fanfictions out there where Naruto has a blue Sharingan. Fanfiction writers often come up with creative and unique ideas like this. They might explore how Naruto's character would be different with this new ability, or how it would change the existing storylines in the Naruto universe.
Another aspect could be the reaction of the other characters in the Naruto universe. Some might be fearful of the new power, thinking the character with the transplanted Rinnegan could become a threat. Others might see it as an opportunity to use this new - found power for their own purposes, like fighting against a common enemy. There could be a lot of political intrigue and power struggles within the ninja villages as a result.
Perhaps Naruto gets the blue Sharingan as part of a forbidden ritual that was meant to save the Hidden Leaf Village from a powerful dark force. This would lead to him being shunned by some villagers who fear his new, unknown power. He would then have to prove himself and his intentions with the Sharingan. Also, it could be that the blue Sharingan is a key to unlocking a hidden dimension that holds the secrets to ultimate ninja power, and Naruto embarks on a journey to explore this dimension.