In a 'Naruto and Hinata reborn fanfiction', perhaps they are reborn with enhanced abilities. They might be reborn into a world where ninjutsu works differently. Naruto could be more in touch with his Uzumaki heritage from the start, and Hinata might have a new form of Byakugan. They would have to learn how to use these new powers together, and also navigate their relationship, which may be different from their past life due to different circumstances.
The plot could involve Naruto and Hinata being reborn as Shinigami. Naruto might be a hot - headed but talented Shinigami, quickly rising through the ranks. Hinata could be in a different division, perhaps the 4th division due to her healing - like nature. Their relationship could develop further as they face challenges in the Soul Society. They could also encounter some Bleach villains who mistake their chakra - based powers for some new and dangerous spiritual abilities, leading to some intense battles.
A simple plot could be that Hinata gets injured while on a mission, and Naruto takes it upon himself to nurse her back to health. During this time, they have long conversations and get to know each other on a deeper level, leading to the start of their romantic relationship.
The plot could involve Naruto protecting Hinata from the Hyuga clan's strict traditions. Since he's not bound by those traditions as her brother, he could fight against the elders who want to keep Hinata in a subservient role.
It could also be a misunderstanding. Hinata might be framed as a traitor. Some false evidence could be planted that makes Naruto and his friends believe she has betrayed them. This would lead to a lot of drama and conflict in the fanfiction as Naruto struggles with whether to believe Hinata or the evidence against her.
It could be about Naruto and Hinata going on a secret adventure together. Maybe they discover a hidden place in Konoha that no one else knows about and have to protect it from some sort of threat.
One possibility could be that in the fanfiction, Naruto has realized Hinata's unwavering love and support over the years. So, he starts to obey her out of respect and love. For example, Hinata might suggest a new training method for Naruto, and he obeys without question because he trusts her judgment. It could also involve Hinata having a say in Naruto's decisions regarding the village, as she is also a respected ninja.
One possible plot could be that the Joker discovers a way to travel between universes and ends up in the Naruto world. He decides to target Konoha because it seems like a place full of order that he wants to disrupt. Naruto and Hinata notice the strange new presence in the village. They initially underestimate the Joker, but as he starts causing mayhem, they realize they need to combine their skills to stop him.
In this fanfiction, perhaps Hinata and Naruto are living together and learning more about each other on a deeper level. Hinata could be teaching Naruto some of the traditional Hyuga clan techniques, while Naruto shows Hinata some of his unique jutsu. Their living situation might also involve a lot of visits from their friends like Sakura and Sasuke, creating some really fun and heart - warming group dynamics.
Some writers might do it for shock value. They want to create a story that stands out and goes against the norm of the relationship that fans are used to. By creating this unexpected plot, they hope to attract readers who are interested in seeing a different side of the characters.
A plot could be that Hinata is bent over a garden, planting some flowers. Naruto, being curious, comes to see what she is doing. As he approaches, he startles her a bit. They then have a conversation about the beauty of nature and how Hinata finds peace in gardening. This could be a sweet moment that shows their different hobbies and how they can still connect on a deeper level.