Well, if Sakura went with Sasuke, it might have changed the dynamics of their relationship. They could have learned to understand each other better and overcome their differences. Also, it could have had an impact on the plot of the overall story.
If Sakura went with Sasuke, there could have been a lot of interesting developments. Maybe they would have discovered new powers or found a way to bring peace in a different way. It all depends on the creativity of the fanfiction writer.
It could have been a very different story. Harry might have had more freedom and a stronger sense of family with Sirius.
It could have led to a completely different story arc. Maybe they would have teamed up and faced even greater challenges together.
If Naruto had left, it might have caused chaos in the village. His absence could have given rise to new villains or changed the relationships among the remaining characters. Also, his journey outside could have introduced him to unexpected allies and challenges.
His name could be Kazuki. It has a strong and modern feel to it, while still fitting in the Naruto universe. It could also mean 'harmony' or 'peace', symbolizing the hope that Sasuke and Sakura have for their family and the ninja world.
If Sakura wasn't from Konoha in fanfiction, it could mean she'd have a whole new backstory and motives. Maybe she'd be from a rival village and have a conflicted relationship with the Konoha ninjas. Or she could be from a neutral place, giving her a more independent and unique perspective on the ninja world.
Sakura would be over the moon. She would blush deeply and look at Sasuke with so much love in her eyes. She might be at a loss for words for a moment, but then she would find her voice and tell Sasuke that she has been waiting for this moment her whole life. She would also feel a sense of pride that Sasuke has chosen her, after all they have been through. And she would immediately start thinking about how to share the good news with their friends, especially Naruto, who has been like a brother to her and has also been a part of their journey.
Sakura might be initially frustrated. She's used to Sasuke being in control, so seeing him drunk could be a bit of a shock. But then she'd probably feel a sense of protectiveness and try to sober him up.
In the hospital setting, Sasuke might initially be his aloof self. But as Sakura takes care of him or they face challenges together, he could start to open up more. For example, if Sakura is overworked, Sasuke might offer a helping hand in small ways, like getting her coffee. This would show his growing affection for her.
Sakura might develop into a more confident and assertive person. After the war, she has proven herself as a strong kunoichi, and with Sasuke by her side, she could grow even more. Sasuke, on the other hand, would develop by learning to trust and love again. He has been through so much, but with Sakura's love and support, he could become a more stable and caring person.
Sakura's ability to forgive and still care for Sasuke despite his past actions could also make him proud. In many fanfictions, she represents unconditional love. This selfless love and her ability to see the good in him, even when he was at his worst, could make Sasuke proud of her as a person.