Yes, there might be such fanfics in the Naruto fanfic community. Some fans like to create unique family relationships in their stories, and making Naruto and Shisui brothers is an interesting concept that could lead to many different plotlines and character interactions.
One possible plot could be that Naruto grows up with a different understanding of the Uchiha clan because of his connection to Shisui. He might be more involved in Uchiha affairs from an early age. For instance, he could try to prevent the Uchiha massacre, using his and Shisui's combined influence.
In this kind of fanfiction, Naruto might obtain Shisui's brother's Sharingan through some unforeseen events. Maybe Shisui's brother sacrifices himself and entrusts his Sharingan to Naruto. As for new abilities, it could enhance Naruto's perception skills like being able to see through genjutsu more easily and also improve his combat awareness in battles.
The relationship would have a major impact on Naruto's character development. Knowing he has an Uchiha brother, he might study more about the Uchiha ways and culture. This could lead to new jutsu combinations, like combining his Rasengan with some Uchiha - style fire jutsu. Emotionally, it would give him a stronger family bond, which was something he always desired. In the overall Naruto universe, this could inspire other characters to look beyond clan differences and strive for unity, as Naruto and Shisui's relationship would be a symbol of bridging gaps between different groups.
In this scenario, Naruto being Shisui's brother would mean he might have grown up with a different kind of training. Shisui was highly skilled in the ways of the ninja. Naruto could have learned some of his stealth and combat techniques at an earlier age. This would make him an even more formidable opponent. Moreover, it could have an impact on the Akatsuki's plans. They were after the Sharingan, and if Naruto was related to Shisui, they might target him differently. It could also change the way the village of Konoha views Naruto. He would have a stronger connection to the Uchiha, which could either make them more suspicious of him or more protective, depending on how the story unfolds.
Perhaps the plot twist is that Shisui faked his death not just to protect the village in the general sense, but specifically to keep Naruto safe. He knew of Naruto's importance as the Jinchuriki of the Nine - Tails and his relation to Naruto as a brother. So, he went into hiding and has been secretly guiding Naruto from the shadows all along. This would add a whole new layer to Naruto's journey and the events that have unfolded in the series so far.
Yes, it's quite possible. Fanfic authors enjoy re - imagining established relationships. The idea of Naruto being Minato's brother instead of his son can lead to interesting plot twists. For example, their interactions would be different, perhaps more like equals or rivals in some aspects. Also, the way other characters in the Naruto series would interact with Naruto in this new relationship context could open up many new story possibilities.
There could be. Fanfics often explore really wild and creative ideas. Since both Naruto and Rukia are from very popular anime series, some fans might be intrigued by the concept of them being related. It would open up a whole new set of storylines, for example, how their different upbringings in their respective worlds would still lead to a brother - sister bond. Maybe Naruto would introduce Rukia to ramen in this fanfic world.
There might be. In the Naruto series, both Naruto and Nagato have complex backstories. If they were brothers in a fanfic, it would be really interesting. Maybe Naruto could have influenced Nagato to take a different path earlier. For example, Naruto's positive attitude towards life and his belief in peace could have rubbed off on Nagato, preventing him from going down the more violent routes he took in the original story.
Yes, there are some fanfics out there with this concept. It's an interesting take on the Naruto universe as it completely changes the dynamics between the two characters. They would have a very different relationship compared to the original series, with Naruto being more of a protective family figure to Sakura.
Another ability Naruto could gain is a deeper understanding of genjutsu. Shisui was very proficient in genjutsu, especially with his Sharingan. Naruto, being his brother, could have a natural aptitude for genjutsu. He could learn to break through stronger genjutsu more easily and also use more advanced genjutsu himself. This would be a significant change as Naruto was not originally known for his genjutsu skills, but with this new connection, he could become a more well - rounded ninja.