The Naruto universe would be completely desolate. There would be no more ninja villages, no more clans, and no more shinobi way. It would be a world filled with silence and death.
One possible plot could be that Naruto is somehow corrupted. Maybe he's been influenced by a powerful dark force or a powerful enemy has tricked him into believing that everyone is a threat to the world he wants to protect. So, he decides to take extreme measures and kill everyone to 'create peace' in his warped sense.
No. Most Naruto fans are drawn to the original themes of the series like friendship, hard work, and redemption. A fanfic where Naruto kills everyone goes against these core values and is likely to be very unappealing to a large portion of the fan base.
Well, it could be a dark AU (alternate universe) where Naruto is pushed to the brink. Maybe he discovers some great betrayal among his friends and village. So in his rage, he decides to take revenge and starts killing everyone. But this is a very extreme and uncharacteristic concept for the original Naruto character.
Yes, it is quite disturbing. Harry is typically seen as a hero, and the idea of him killing everyone goes against his fundamental character. It subverts the positive and heroic image that fans have of him, and it involves a lot of death and destruction which is generally not pleasant to think about.
The immediate consequence would be the destruction of Konoha, which is a major power in the Naruto world. This would create a power vacuum that other villages might try to fill, leading to possible wars and political unrest.
One possibility could be that Harry is under some dark magic influence. Maybe he's been corrupted by a powerful and evil spell or artifact that makes him lose his sense of right and wrong, leading him to turn on everyone. Another aspect could be that he's been betrayed so deeply by those he trusted that he snaps and decides to take revenge on everyone, believing they are all against him.
No, it doesn't seem to be a common concept. Usually, Naruto fanfiction focuses on various aspects like character development, new relationships, or different story arcs that are more in line with the general themes of the original series, which is not mainly about 'kills'.
It could be a variety of villains. Maybe some of the traditional Naruto villains like Orochimaru or Pain could be in the story and Naruto kills them. Or perhaps in this fanfiction crossover, there are new villains created that are a combination of Naruto - style threats and Justice League - type menaces. It's hard to say exactly without reading the fanfiction, but it would be interesting if it included some well - known Naruto baddies being taken out by Naruto in a new setting with the Justice League around.
In a fanfic where Naruto kills Sirzechs, it could be a very interesting concept. Maybe it's a crossover universe where the power dynamics are completely different. Naruto, with his powerful jutsu, might have a reason like protecting his own world from a perceived threat by Sirzechs. However, it also depends on how the author has set up the story, the rules of the world they've created, and the motives given to Naruto for such a drastic act.