One interesting plotline could be Hinata becoming a powerful ninja in her own right and protecting Naruto instead of the other way around. For example, she could master a new and unique jutsu that saves Naruto from a powerful enemy.
Another plotline might involve Hinata and Naruto going on a journey together, not for a mission but to discover something about themselves or the ninja world. They could encounter various challenges that test their relationship and individual growth, like dealing with a lost ancient ninja art that only they can unlock together.
One plotline could be that Hinata sees Naruto getting a lot of attention from other female characters in the village. This makes her jealous as she has deep feelings for him. For example, when Naruto is invited to a party by a group of girls and Hinata overhears them talking about how great he is. She starts to doubt if she has a chance with him and her jealousy grows.
One interesting plotline could be them going on a mission together as a married couple. It would be different from their solo missions as they have to rely on each other in a new way. Another could be Hinata introducing Naruto to some of the more traditional Hyuga family customs now that they are married.
One possible plotline could be a story where Naruto has to choose between two versions of Hinata, the original Hinata and a version from an alternate RTN (Road to Ninja) universe. Maybe in this fanfiction, the different Hinatas have unique abilities or personalities that make Naruto's choice more difficult.
Hinata's relationships also develop in different ways in fanfictions. Her friendship with other characters like Sakura or Shikamaru can become more complex. She might form alliances with them to protect Naruto or the village. And of course, her romantic relationship with Naruto can take on various forms, from a slow - burn love story to a more immediate and passionate connection, depending on the writer's vision.
A possible plotline is that the symbiote has its own agenda. It might try to influence Naruto in ways that are not good for the village. Hinata then has to figure out a way to separate the symbiote from Naruto without harming him. She could use her Byakugan to study the symbiote's connection to Naruto.
One interesting plotline could be where Hinata gets a new power and Naruto has to learn to work with her in a different way. For example, if Hinata got a power related to time - manipulation, it would create a whole new dynamic in their relationship and adventures.
One interesting plotline could be Naruto slowly realizing his feelings for Hinata during a dangerous mission. Maybe they get separated from the group, and in that time of solitude and relying on each other, Naruto starts to see Hinata in a new light.
One interesting plotline could be Hinata secretly training harder to impress Naruto. She might be doing it on her own without anyone knowing, and then one day she surprises Naruto with her new skills.
One possible plotline could be Naruto and Hinata using their newfound god - like powers to protect the Hidden Leaf from a powerful, otherworldly threat. They could travel to different dimensions to gather allies or resources. Another could be them having to deal with the moral implications of being gods, like how much they should interfere in the lives of mortals.
One interesting 'Naruto Rescue Hinata' fanfiction could be where Naruto has to use his new and powerful jutsu to save Hinata from a group of rogue ninjas. He battles through various traps and enemies, relying on his determination and love for Hinata.