They can start by developing Sakura's character more fully. Give her new interests, skills, or goals that don't revolve around Sasuke all the time. This way, Naruto might find her more interesting.
Fanfiction writers should create more positive interactions between Naruto and Sakura. Instead of having her be a source of annoyance, make her someone who supports Naruto's dreams and vice versa. For example, they could write about Sakura training with Naruto to help him achieve a new jutsu, or Naruto helping Sakura with her medical ninjutsu in a way that deepens their friendship. By changing the nature of their relationship in the fanfic from a negative or tiresome one to a positive and collaborative one, Naruto would no longer be sick of her.
Perhaps a bigger threat or a common enemy could emerge. This would force the three of them to work together more effectively. Sakura would then realize that hitting Naruto is counter - productive and Sasuke would be glad that the situation has changed. For example, if a powerful new enemy attacks the village, they would need to focus on defending it together rather than internal squabbles.
The relationship could take an interesting turn. Naruto, having hypnotized Sakura, might start to understand her better on a subconscious level. Maybe he discovers her hidden fears or desires through the hypnosis. Sakura, on the other hand, might develop a sense of vulnerability towards Naruto that she didn't have before. This could lead to a deeper emotional connection between them once the hypnosis is resolved, as they've shared an unusual experience that forces them to re - evaluate their feelings for each other.
One way could be for the fanfiction writer to re - evaluate Sakura's character based on the original Naruto series. They should focus on her core traits like her intelligence, her medical skills, and her growth as a kunoichi. By doing this, they can bring her character back in line with what fans expect.
The dynamic would be turned upside down. Sasuke would likely become more of an outcast or a loner, feeling rejected. Naruto would be in a difficult position, having to balance his friendship with Sasuke and his new relationship with Sakura. Sakura would be the catalyst for this change, and she would have to face the consequences of her actions, like dealing with the villagers' opinions and the potential backlash from Sasuke's supporters.
If Naruto is sick of Team 7, he could start his own solo adventures in the fanfiction. This would give him a chance to grow independently and maybe learn new skills or meet new characters. Meanwhile, Team 7 would have to figure out how to function without him, which could result in some interesting character development for Sasuke and Sakura.
In fanfiction, Naruto's character can change in terms of his social skills. Since he has a strong affection for Sakura, he may become more outgoing and sociable in an attempt to get closer to her. He could start spending more time with Sakura's friends, which is a big change from his previous focus mainly on his own small group of friends. His values might also shift. For example, he might start to value Sakura's opinions more than anyone else's, and this could influence his decisions in various aspects of his life, like when choosing missions or dealing with village politics.
Well, it completely flips it. Instead of Naruto being his own self and having his normal interactions with Sakura, he now has to experience things from her perspective. He might be more empathetic towards her feelings, especially her insecurities, which he might not have fully understood before.
They become more united as they face the challenges of parenting together. Their relationship deepens as they share the joys and sorrows of raising a child.
It often changes drastically. Sakura may initially feel hurt and angry. She might start to question all her previous beliefs about Naruto. For example, if Naruto betrays her trust in a battle situation by seemingly siding with the enemy, Sakura's view of him as a reliable friend and teammate would be shattered.
They would become more protective of each other. Naruto, who has always been protective, would be even more so now that Sakura is carrying their child. Sakura, on the other hand, would be more aware of Naruto's safety as well, knowing that their family depends on him.