The story could change in many ways. For one, Naruto's character development might take a different turn. Instead of being so focused on Sasuke, he could become more involved in the political aspects of the village. His relationships with other characters, like Sakura and Kakashi, might also change. Sakura might be disappointed at first, but then she could see Naruto's new perspective. Kakashi could be proud that Naruto is growing up and making his own decisions.
Sakura might be initially confused. She could be thinking about what she did wrong to make Naruto stop talking to her. Since they have been friends for a long time, this sudden change would be very puzzling for her.
I'm not sure specifically as there could be many different interpretations of such a fanfic. It might be about Naruto finally dropping a false facade he's been maintaining throughout the story, perhaps related to his strength, his relationships, or his goals.
He could also become very sad and withdrawn. Naruto has always valued his relationships, and losing Hinata's love would be a huge blow to him. He might start to question himself and wonder what he did wrong.
The plot could become more straightforward. Without Naruto's acting, there would be less deception and more direct confrontation. For example, if Naruto was previously acting as a double agent, his true identity being revealed earlier would lead to immediate battles or negotiations.
There is a fanfic named 'Naruto's Final Stand Against Sasuke'. In it, Naruto, having grown stronger both physically and mentally, confronts Sasuke. He uses his newfound powers along with his memories of their shared past to halt Sasuke's rampage. It shows how Naruto's growth as a character is key in stopping Sasuke. And 'The Bridge to Redemption' is also a great one, where Naruto meets Sasuke on a significant bridge, much like in their past encounters, and through their conversation, Naruto manages to prevent Sasuke from going further astray.
The appeal of 'Naruto stops Sasuke' fanfics lies in the fact that Naruto and Sasuke are two very popular characters. People want to see more of their interactions. These fanfics often delve into the psychological aspects of both characters. Naruto's determination to stop Sasuke is something that fans find inspiring. It also satisfies the fans' desire to see a more positive outcome for their relationship compared to the sometimes dark and convoluted path their relationship takes in the original series. So, it's a way for fans to rewrite a part of the story in a more hopeful and heartwarming way.
One possible reason could be that the fanfiction author wants to focus on other characters. Maybe they feel they've explored Naruto's character enough and want to give more spotlight to characters like Sasuke or Sakura. Another reason might be that the plot of the fanfiction takes a turn where Naruto's acting skills are no longer relevant or needed.
One possible reason could be that the author wants to focus on other characters. Maybe they feel that Naruto's story has been told enough in the fanfic and it's time to give other characters the spotlight.
One possible reason could be that Naruto has faced too many betrayals. Maybe his friends turned on him in the fanfic, which made him lose faith and stop caring.