One possible reason could be that Sasuke might have gone too far in his pursuit of power even after the war. He could have been a threat to the newfound peace in the ninja world, and Naruto, as the protector of peace, might have felt he had no other choice.
The village of Konoha would be in shock. Naruto is seen as a hero, but killing Sasuke, who was also a powerful and well - known ninja, would be a very controversial act. Some might support Naruto, believing he had no other choice for the greater good. Others would be angry and might even turn against him, thinking he could have found another way.
There could be. Fanfiction allows for a wide range of interpretations and alternate storylines. But it's a really extreme and disturbing concept considering the bonds that Naruto, Sakura, and Sasuke share in the official story. It would be a very different take on the characters, and most fans who love the original story would probably find it hard to accept.
This type of fanfiction concept is really out of the ordinary. Naruto's character is built on his values of friendship, loyalty, and his dream of becoming Hokage. Killing Sasuke would mean betraying all of that. However, in a fanfiction, the author might be exploring the 'what - if' scenario. For example, what if Sasuke's actions against Konoha were so heinous that Naruto felt he had no choice? But still, it's a far - fetched and very different view from the original Naruto we know.
This kind of fanfiction usually explores alternate storylines and character dynamics. It might be based on intense conflicts or unexpected plot twists.
Sasuke's development would be complex. He might start to question his entire ideology that led him to kill Naruto. He could become more empathetic towards others as a result of his regret, realizing the value of life that Naruto always represented. He might also try to make amends in the ninja world, but it would be a long and difficult journey as he has to deal with his own guilt.
Yes, there are likely some fanfics out there with such a plot. Fanfiction is a creative space where authors explore different scenarios. However, it goes against the general narrative of the Naruto series where Naruto is more about saving Sasuke.
There are fanfictions where Naruto and Sasuke's relationship after the war is more of a mentor - student dynamic. Naruto, with his growth and new - found wisdom, could be teaching Sasuke about different aspects of life in the village. Sasuke, in turn, could be teaching Naruto some of the more esoteric ninja techniques he learned during his travels. This way, they are constantly learning from and growing with each other.
One great fem Naruto x Sasuke after - war fanfiction is 'A New Beginning'. It focuses on how Naruto, as a female in this version, and Sasuke deal with the post - war rebuilding. Their relationship is portrayed in a very nuanced way, with Naruto being the driving force in getting Sasuke to open up more to the village again.
In some fanfictions, Naruto and Sasuke become closer friends. They finally understand each other completely and work together to rebuild the Hidden Leaf. They often meet up and share their experiences, training the next generation side by side.