A plotline might involve Naruto being sent to the Bleach universe accidentally and there he realizes he has a Fullbring. He then has to figure out how to get back to his own world while also using his new ability to survive in the Bleach world and make allies. He could learn about the Soul Society and Hollows through his Fullbring experiences.
One possible plotline could be Naruto discovers he has a hidden Fullbring ability. He then has to learn to control it while still dealing with the threats in his own world. Maybe he uses it to fight stronger enemies like Madara in a new and unexpected way.
I'm not sure about a specific 'naruto has a fullbring' fanfiction off the top of my head. You could try searching on fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of Naruto fanfictions and you might be able to find one with this concept there.
One possible plotline could be Naruto becoming a sort of outcast ninja. He would focus all his energy on solo missions and self - improvement, perhaps trying to prove to the village that he doesn't need friends to be a great ninja. Another could be that he gets involved in a darker side of the ninja world, as without friends to keep him on the right path, he might be more vulnerable to negative influences.
A common plotline might be that the vampire girlfriend has special powers that Naruto needs to defeat a powerful enemy. For example, her ability to control blood could be used in a creative way in battle. Also, there could be a plotline where their relationship is forbidden because of her being a vampire and Naruto being a ninja, and they have to fight against the norms of their respective worlds to be together. This would involve them facing opposition from both the ninja community and any vampire clans that exist in the fanfiction.
One possible plotline could be that Naruto's silver hair is a result of a powerful curse placed on him. This curse could be related to an ancient evil that is trying to use Naruto as a vessel. So, the story could revolve around Naruto trying to break this curse while still being the hero he is. Another plotline might be that his silver hair is a sign of a new chakra form he is developing. He then has to learn how to control this new form and use it to protect the village from a new threat.
One possible plotline could be that Naruto discovers he has this strange one - wing on his back. It might be a sign of some ancient prophecy or a new form of chakra manifestation. Maybe he has to go on a journey to find out the origin and purpose of this wing, meeting new characters along the way who either help or hinder him in his quest.
One possible plotline could be Naruto struggling to keep his ninja duties while dealing with the illness. He might try to hide it from his friends at first. Another could be him seeking out rare medical ninjutsu or herbs to cure himself. Maybe he teams up with some unlikely allies in his search for a cure.
A plotline could start with Naruto suddenly developing Steel Release after a strange encounter. He then has to hide this new power from his friends and village at first because he's not sure how they'll react. As he explores his Steel Release, he realizes it has a connection to a long - lost clan. He might then have to decide whether to reveal the existence of this clan and his new power. Additionally, his Steel Release could be used to rebuild the village after a disaster, like creating steel structures to replace damaged buildings, which would also be a great way to show his growth and contribution to the community.
Well, it could start with Naruto suddenly getting the phoenix wings. This strange new development in his appearance makes him an outcast in the village at first. But then, a male character who has always been intrigued by Naruto's unique nature steps forward. Their relationship blossoms as they try to figure out the origin and purpose of the wings. Along the way, there could be elements of jealousy from other characters, and they have to face battles both physical and emotional while exploring their feelings for each other in this yaoi story.
A possible plotline could be that the Ketsuryugan gives Naruto the ability to see the true nature of people's chakra, which causes him to question some of his relationships. He might discover that some people he thought were friends have ulterior motives. Also, there could be a story where Naruto uses the Ketsuryugan to develop a new form of his Rasengan, combining the power of the Ketsuryugan with his existing skills. This new ability could then be the key to defeating a powerful and previously undefeatable enemy in the fanfiction.
In this fanfiction, a plotline could be that Naruto is initially unaware of the full potential of his Haki. As he starts to explore it, he realizes that it can unlock hidden secrets about his family or the origin of the ninja world. This could send him on a quest to discover more. Also, the concept of Haki being a'slave' might imply that there is some dark force trying to control Naruto through the Haki. He has to fight against this internal and external control, which could be a major plotline. Additionally, his new power could attract the attention of powerful villains from other regions who want to either use Naruto or destroy him because of his Haki - enhanced abilities.