One possible fanfiction idea could be that Naruto discovers a hidden connection between his Rinnegan and the Fire Temple. Maybe the power of the Rinnegan unlocks a long - forgotten secret within the temple, like a special jutsu or a prophecy. This could lead to Naruto having to face new enemies or challenges related to the temple's secrets.
The plot could involve Naruto being drawn to the Fire Temple due to his Rinnegan. Once there, he discovers that the temple holds a key to unlocking the full potential of his Rinnegan. But there are forces within the temple who oppose his presence, fearing the power of the Rinnegan. Naruto has to overcome their doubts and work with those who are willing to help him, like a young novice monk who believes in Naruto's good intentions.
One possible fanfiction could be about a character who has the unique ability to combine the powers of the Sharingan, Byakugan and Rinnegan. For example, they might use the Sharingan's precognitive abilities, the Byakugan's long - range vision and the Rinnegan's power over life and death to fight off a powerful new enemy that the regular ninja in the Naruto universe can't handle. This would create a really interesting story full of action and strategic battles.
In a Rinnegan Naruto The Originals fanfiction, the story could focus on Naruto exploring the true origins of the Rinnegan. He might discover that the Rinnegan has a connection to his Uzumaki heritage that was previously unknown. This could lead to a whole new arc where he has to travel to different hidden villages or ancient ruins to uncover more about this powerful eye technique and how it relates to his family's past.
If Naruto got the Rinnegan, he might become more cautious. The power of the Rinnegan is so great that he would realize he needs to be more careful with it. He wouldn't be as brash as before.
One possible fanfiction could be about Dark Naruto using the power of the Rinnegan in unique ways. Maybe he uses it to reshape the ninja world according to his own dark vision. He could manipulate the six paths powers in a more malevolent way than we've seen in the original series.
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.
Well, it could be about Naruto having the Rinnegan and also having some sort of gamer - like abilities. Maybe he uses his new powers in the context of the game - like elements in the Naruto world. For example, he might level up his Rinnegan skills or face challenges as if they were game quests.
Perhaps the missing nin discovers new abilities within the Rinnegan that no one else has. They might be able to combine different paths in unexpected ways. For instance, using the Animal Path to summon creatures and then enhancing those creatures with the power of the Asura Path. This would make their summoned beasts more powerful and difficult to defeat in combat.
One popular Naruto fire sword fanfiction could be about a new character who discovers an ancient Fire Sword technique. This character, perhaps an outsider to the main ninja clans, stumbles upon the knowledge of the Fire Sword. They then embark on a journey to master it, facing challenges from both those who want to steal the technique and those who doubt their ability because they're not from a traditional ninja family.
A story could revolve around a Naruto character with the Rinnegan who is mistaken for a new type of supernatural being in the Highschool DxD world. As they navigate this new environment, they might have to hide their true identity at first. But as the story progresses, they could reveal their powers and form alliances with some of the factions in DxD. They might also introduce some ninja concepts like chakra and jutsu to the DxD characters, which could change the power dynamics in that world.