He could be feared by the remaining ninja. Since he has killed all his enemies, others might see him as a ruthless killer rather than a hero. This could lead to isolation as people would be scared to approach him.
In some fanfics, Naruto might gain new powerful jutsus through intense training with a hermit or by unlocking some hidden bloodline limit. Maybe he discovers a new form of chakra control that gives him an edge over his enemies.
Yes, there are likely some out there in the vast world of fanfiction. Fanfiction writers often come up with unique and unexpected crossovers like this. However, the quality and popularity can vary greatly.
Yes, there might be such fanfictions out there. Fanfiction writers often create crossovers where they put characters from different universes like Naruto and High School DxD together and come up with various scenarios, including ones where Naruto could potentially 'kill' a character from the DxD universe. However, the quality and nature of these fanfictions can vary greatly.
In a 'Naruto kills the Sandaime' fanfic, it would be a very dark and alternate take on the Naruto universe. This goes against the traditional bond and respect Naruto has for his village elders. It could be a result of some extreme corruption within the village that Naruto discovers, leading him to take such a drastic step. However, this is a huge deviation from the original storyline.
No. Most Naruto fanfics tend to focus on positive relationships, growth of characters, and adventures within the Naruto universe. A plot where Sakura kills Naruto goes against the general themes of friendship and camaraderie that are central to the Naruto series, so it's not very common.
Well, it's quite possible. Fanfiction is a vast world. Given Naruto's power and the concept of demon lords which could be borrowed from other fantasy concepts, it's not a far - fetched idea for a fanfiction. However, not all fanfictions are easy to find. You might need to dig deep into the search engines of the fanfiction platforms, use different keywords related to Naruto, demon lords, and killing if the initial search doesn't yield results.
Well, in a 'sakura kills naruto fanfic', it could be that the writer wants to explore a completely different side of Sakura's character. Perhaps in this fanfic's universe, Sakura has been corrupted or misinformed in some way that leads her to believe Naruto is a threat. It could also be a very edgy attempt at creating a shock - value story within the Naruto fan community.
In some fanfictions, Naruto might kill the Kyuubi to gain ultimate power. He could absorb its chakra in a way that completely destroys the Kyuubi's consciousness. This could be a dark turn for Naruto, as the Kyuubi has been both a curse and a source of strength for him. However, it would also mark a new chapter in his journey, where he has to deal with the consequences of such a drastic act.