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.
Perhaps in the fanfiction, Naruto and Sasuke's brotherly bond is tested when Sasuke's Sharingan starts to show signs of corruption. Naruto must find a way to save Sasuke from the dark influence of the Sharingan. He seeks the help of various ninja masters and even some forbidden jutsu. Meanwhile, Sasuke is struggling with his inner demons, and the only thing that can bring him back is Naruto's unwavering belief in their brotherhood.
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.
One idea could be that they discover they are blood brothers during a dangerous mission. This revelation then changes their entire dynamic and they start to fight side - by - side with a new level of unity. Another could be that there is a hidden prophecy about the two of them as blood brothers saving the ninja world in a unique way that no one else could.
Well, in such a fanfiction, one possibility is that Naruto would inherit some of the Sharingan's powers through their brotherly bond. Since they are so close, Sasuke's Sharingan might react differently to Naruto. It could give Naruto an ability to see chakra in a new way, similar to how the Sharingan works. This would be a really cool addition to Naruto's existing powers and would make their battles more interesting.
One idea could be that they grow up with a new sense of family loyalty. They might support each other in ways different from the original story. For example, Sasuke could be more open about his feelings because he has Naruto as a true brother. Another plot could be them facing challenges together that are specifically related to their adopted family status, like dealing with the expectations of their new family or protecting their new family from threats.
One great fanfiction could be about Naruto and Sasuke growing up as brothers and discovering the power of the Sharingan together. They might face challenges like protecting their village from a new and powerful enemy. The Sharingan could give them an edge in battle, and their brotherly bond could be a source of strength for both of them.
Maybe in the fanfiction, Naruto and Sasuke enter a tournament together. They support each other throughout the battles, with Sasuke using his sharingan to analyze opponents' moves and Naruto using his shadow clones to create diversions. Their combined efforts and the way they cheer each other on is like real brothers.
One plot idea could be that they discover their relation early on. Naruto, being his usual positive self, tries to get closer to Sasuke right away. Sasuke, on the other hand, is initially in denial but gradually warms up as they start to train together more often. They could team up against stronger enemies earlier in the story, using their combined skills and the new - found bond of being half - brothers to their advantage.
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.