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.
The plot could take a turn where Naruto's bite changes his personality. He might become more aggressive or withdrawn, depending on the nature of the bite. This would affect how he interacts with his team. Sakura, for instance, might be more focused on helping Naruto rather than having her usual feelings for Sasuke. And Kakashi would have to adjust his training methods to deal with Naruto's new situation.
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.
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.
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.
Maybe in the fanfic, a dark force is trying to corrupt Sasuke's Sharingan. Sasuke, realizing he can't control it on his own, gives it to Naruto. Naruto, with his strong will, battles the dark influence within the Sharingan. He uses his own positive energy and friendship bonds to purify the Sharingan. Eventually, he masters it and uses it to bring light back to the ninja world, also using it to reunite with Sasuke in a more powerful and united way.
The Jiongu could have a connection to Naruto's family that he was unaware of. Maybe it was something that his ancestors had encountered before. This discovery could change his perception of his family's history. Also, the Jiongu might seem like a great power at first, but it could turn out to be a double - edged sword. It could start to drain Naruto's life force or chakra over time, forcing him to find a way to either get rid of it or find a balance.
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.
Perhaps the plot twist is that Naruto has to hide his new vampire nature from his friends in Konoha. This would create a lot of internal conflict for him. He might be afraid that they'll reject him if they find out. And at the same time, he has to deal with the new cravings and instincts that come with being a vampire. It could lead to some really tense and emotional moments when his friends start to suspect something is wrong.
Well, it could be about Naruto finally having a peaceful family life with Hinata. Maybe it shows them raising their kids, teaching them ninja skills, and having family dinners together. It would be a really heartwarming story to see Naruto, who grew up without a family for a long time, enjoying a loving family environment.
Well, it could be about Naruto getting into some serious trouble in the Hidden Leaf Village. Maybe he broke an important rule or made a big mistake during a mission. And as a form of punishment, he gets spanked by one of the village elders or his sensei. It's a rather unorthodox way of discipline in the Naruto world but could make for an interesting fanfic plot.
Perhaps in this fanfic, the Sharinegan is a power that is transferred to Naruto from a dying enemy. At first, he struggles to control it because it's so different from his normal chakra-based powers. But with the help of his friends like Sasuke and Sakura, he learns to master it. He then uses the Sharinegan to uncover secrets about the ninja world's past that are crucial for the future of all ninja.