In this fanfiction scenario, Naruto killing the Uchiha clan would make him an outcast in Konoha. The village that once supported him would turn against him. This could lead to Naruto leaving the village and becoming a rogue ninja. He might then form his own group of allies who believe in his cause, whatever that might be in this altered story. It would also change how the Akatsuki views Konoha. Instead of targeting Sasuke, they might target Naruto directly as the one who eliminated the powerful Uchiha clan.
Well, if Naruto kills the Uchiha clan in fanfiction, it's a huge departure from the original story. It could potentially create a very dark Naruto. Maybe he was somehow mind - controlled or tricked into doing it. But regardless, it would shatter the image of Naruto as a hero. His bond with Kurama might even be affected, as Kurama might not want to be associated with a killer of an entire clan. And the political ramifications within Konoha would be massive, with the elders and other clans having to deal with this new, extremely dangerous Naruto.
In a fanfiction where Naruto kills the Akatsuki, it could lead to a much more peaceful ninja world much sooner. The Akatsuki's plan to capture the tailed beasts was a huge source of unrest. With them out of the picture, the villages might not be as paranoid about security. However, it could also lead to new problems. The power vacuum left by the Akatsuki could be filled by other evil forces or there could be internal power struggles within the villages that were previously united against the Akatsuki threat.
Well, in this fanfiction scenario where Naruto kills the Uchiha clan, it would mean the end of the Sharingan bloodline in a very unexpected way. This would have huge implications for the ninja world. Without the Uchiha, there would be no potential for the Mangekyou Sharingan or the Eternal Mangekyou Sharingan. The balance of power in the ninja world might shift as the Uchiha were quite powerful. And Naruto himself would be a very different character. He's always been about protecting and saving people, so this act would make him a much darker and more complex figure, almost an anti - hero.
It could be a situation where Naruto discovers some dark secret about the Uchiha clan that he believes makes them a danger to everyone. For instance, if he found out they were planning a coup that would involve mass destruction, he might think that killing them was the only way to save the village and the rest of the ninja world.
Well, one possibility is that Naruto would be trained in the unique Uchiha techniques. He might learn how to use the Sharingan in ways that no one expected. Also, he could gain a new family within the Uchiha clan, which would change his whole perspective on life and belonging.
One way Naruto could save the Uchiha clan in fanfiction is by using his influence. Naruto is highly respected in the village. He could convince the village elders to re - evaluate their treatment of the Uchiha. He might show them that the Uchiha were being wrongly persecuted and that there was a way to co - exist peacefully. He could also use his power as a Jinchuuriki to protect the Uchiha from any external threats that might be a factor in their downfall.
Well, if Naruto were to massacre the Uchiha clan in a fanfiction, it might be because of a huge misunderstanding. For example, false information could have been spread that the Uchiha were planning something really bad against the village. Naruto, in his haste to protect the village, could have been tricked into believing it and taking drastic action. However, this is a very dark and out - of - character concept for Naruto.
In a Naruto joins the Uchiha clan fanfiction, he could be adopted by an Uchiha. For example, if Sasuke had a change of heart early on and decided to bring Naruto into the clan. Naruto would then be exposed to the Uchiha's dark past and their thirst for revenge. He could use his own positive attitude to try and change the clan's perspective. And he'd surely have to train hard to keep up with the Uchiha's high standards in combat and ninja skills.
In a fanfiction where Naruto kills Sasuke at the Uchiha compound, it's a very dark turn. Naruto's character would be severely damaged in the eyes of many. His journey was about saving Sasuke, not killing him. This could also lead to a power vacuum as Sasuke was a powerful shinobi. The Uchiha clan's already tragic story would become even more so. It might also cause Naruto to lose his way, as Sasuke was a sort of mirror to him, and without Sasuke, he might lose his motivation to keep getting stronger.
One way this could be developed is by exploring a dark Naruto who has been corrupted by power or some outside influence. Maybe he's been manipulated by an enemy of the Uchiha clan who wants to see them destroyed. This could lead to a series of events where Naruto gradually turns against the Uchiha, believing them to be a threat to the village.
If Naruto was part of the Uchiha clan in fanfiction, it would be really interesting. The Uchiha are known for their powerful Sharingan and their complex family dynamics. Naruto being part of it would mean he'd be involved in all of that. He might have a natural rivalry with other strong Uchiha members. His training would focus more on Uchiha - specific jutsu. Also, his relationship with Kakashi could be different, as Kakashi has his own connection to the Uchiha. The story could explore how Naruto uses his Uzumaki traits in combination with Uchiha abilities to create unique fighting styles and solve the problems in the ninja world.