One common theme is redemption. Naruto often uses his second chance from going back in time to redeem past mistakes, especially those related to his relationship with Sakura. For example, he might correct things he said or did that hurt her in the original timeline.
There's also 'Back to the Beginning: Narusaku Edition'. Here, Naruto's time - travel experience is filled with heart - warming moments between him and Sakura. It shows how Naruto, with his future experiences, can be more confident in his interactions with her. The fanfic does a great job of exploring their relationship development in a different timeline, and the author adds some unique jutsu and battles that are related to Naruto's time - traveling situation.
Sasuke is also very popular. As Naruto's friend and rival, many fanfictions explore how their relationship would be different if Naruto had a second chance. For example, Sasuke might be more open to Naruto's friendship earlier due to Naruto's new approach influenced by his future knowledge.
In a NaruSaku - Naruto brings Sasuke back fanfiction, Naruto could have a vision of a future where Sasuke's return and his relationship with Sakura are intertwined. This vision gives him the strength to endure all the challenges on his way to find Sasuke. Sakura, on the other hand, is constantly worried about Naruto but also has faith in him. When Naruto finally reaches Sasuke, he tells him about this vision and how their lives are all connected in Konoha, which makes Sasuke start to consider coming back.
Well, he could potentially change a lot of things. Maybe he would prevent some of the tragedies that happened in the original timeline. For example, he might stop the Uchiha massacre. He could also use his knowledge of future events and the power of the Juubi to make the ninja world a more peaceful place from the start.
One possibility is that Naruto, with his godlike abilities, could completely rewrite the history of the ninja world. He could go back to the time of the Sage of Six Paths and learn from him directly. This would give Naruto an even greater understanding of chakra and ninjutsu. He could then introduce new forms of training and cooperation among the ninja villages, perhaps even preventing future wars. He could also ensure that the jinchuriki are treated better in the past, changing their fates for the better.
Well, in such a fanfiction, the characters might try to change past events. For example, Naruto could prevent some of the early tragedies in his village. Maybe he'd stop the Nine - Tails attack by somehow convincing his father not to sacrifice himself. This would change the whole future of the village and the relationships between characters.
One interesting plotline could be Naruto using his future knowledge to prevent certain tragedies. For example, he might stop the death of his parents. He could also use his knowledge of jutsu to quickly become a much stronger ninja at a younger age and change the power dynamics in the village.
Well, he would have a second chance at life. Since he was a baby, he could grow up with different relationships. He might form stronger bonds with his parents and be able to learn more about his family. Also, he could start training earlier and become an even more powerful ninja. With his knowledge from the future, he could also help the village in new ways, like coming up with better strategies against enemies.
The portrayal of Sasuke is crucial. How he reacts to Naruto's attempts to bring him back. Is he still full of hatred or has he started to have doubts? And how Naruto uses his own experiences and their shared past to break through Sasuke's defenses. Additionally, the setting and the other characters' reactions in the village can add depth to the story.