Another possibility is that it could be a cursed or possessed person. They might not be in control of their actions and end up biting Naruto. This could be part of a larger, darker plot where a curse is spreading and Naruto becomes an accidental victim instead of Sasuke.
It could be a powerful enemy like Orochimaru. Orochimaru was always interested in Sasuke's potential, but if the plot changes and Naruto gets bitten, Orochimaru might see Naruto as an equally interesting subject to experiment on.
In such a fanfic, Naruto might gain some unique abilities from the bite. Maybe it would change his chakra nature or give him a new form. It could also lead to a different relationship with the creature that bit him. For example, if it was a demon, he might have to deal with its influence in a new way compared to Sasuke.
Well, if Naruto gets bitten instead of Sasuke, it could lead to a whole new set of powers for Naruto. Maybe he'd gain some sort of dark or unique ability that changes his fighting style. It could also change his relationship with other characters. For example, his friends might be more worried about him and try to find a way to cure him. And his enemies might see him as an even greater threat or a new target.
Maybe it's an enemy from another village who sees Naruto as a threat to their plans. For example, if there's a group in another village that wants to start a war, they might think that getting rid of Naruto would give them an advantage. Another possibility is that it's a character who has been brainwashed or controlled by an evil force. This could add an interesting layer to the story as Naruto's friends would have to not only deal with his injury but also find a way to break the control on the stabber.
Yes, there might be such fanfics in the vast Naruto fanfic community. However, these often deviate from the original story's canon. Fanfics are a creative space for fans to explore different scenarios, but they can vary greatly in quality and adherence to the characters' original personalities.
Kakashi might also side with Naruto in this scenario. He has trained Naruto and has a deep bond with him. If Kakashi discovers that Naruto has been wronged, he could choose to follow Naruto rather than the village's orders. Additionally, Hinata might be an ally. Her love for Naruto could make her stand by his side, believing in his good nature no matter what the village says.
The fanfic could explore how Sasuke deals with his emotions when Naruto is sick. He might be conflicted between his old rivalry feelings and his newfound, deeper feelings for Naruto. Sasuke could also be the one to stay by Naruto's side when everyone else is busy. He'd watch over Naruto while he sleeps, and when Naruto wakes up, there could be a moment of intense eye - contact that shows the unspoken bond between them.
Another possibility could be a new character introduced in the fanfic. This new character might be using Naruto to gain something, like power or influence in the ninja world, and when they get what they want, they cheat on him. It would add an element of mystery and betrayal to the story.
Shikamaru is another possibility. He is known for his strategic mind. As Hokage, he could use his intelligence to make wise decisions for the village. He may not have the brute strength of Naruto or Sasuke, but his ability to plan and analyze situations would be invaluable in leading Konoha.
Another candidate could be Kakashi. As Naruto's sensei, he is in charge of Naruto's training and development. If Naruto continuously disobeys orders or fails to progress as he should, Kakashi might use this unorthodox method of spanking to get Naruto back on track.