A possible plot is that Naruto's blindness is a result of a powerful enemy's attack. This forces him into a new world of darkness, but also reveals hidden powers within him. He could start to see things in a different way, not literally but metaphorically. His new - found understanding could lead him to be a better leader. For instance, he might be able to understand the pain of the oppressed in a more profound way, and thus fight for their rights more vehemently. His blindness could also be a way to bring out the best in his friends, as they rally around him to support and protect him.
One plot idea could be Naruto finding unique ways to communicate his ninja skills despite being mute. For example, he might use hand signals in a more complex way than normal. Since he's blind, he could develop an extraordinary sense of hearing to detect enemies. Another idea is that he forms a special bond with an animal that helps him 'see' the world around him, like a seeing - eye hawk or something.
One idea could be that the blind Anbu has a special ability to sense chakra in a unique way. For example, they can detect the slightest change in an enemy's chakra, even if they can't see them physically. This gives them an edge in battle.
Maybe Naruto was born blind in this fanfiction. However, his determination and positive attitude attract a group of girls. They see his inner strength and beauty, and as the story progresses, Naruto trains hard to become a powerful ninja in his own way, and the harem girls are there to cheer him on and help him out in battles.
Another plot could revolve around how he copes with the loss of vision in one eye during his battles. He might have to develop new fighting techniques. Maybe he teams up with a magical creature that can act as his 'extra eye' in a sense, guiding him during duels. This could also lead to a deeper bond between him and the creature.
One plot idea could be that Naruto is a celestial being sent to the human world on a mission. He has powers far beyond what normal ninjas possess, like the ability to control the elements on a much larger scale. For example, he could stop a natural disaster by simply willing it. Another idea is that he's a spirit in a human form, and he has to find a way to return to his spirit realm while still protecting the village. This could involve him learning about his true identity through a series of mysterious encounters.
Well, a plot could involve Naruto being initially ostracized in the village because of his deafness. But then, he proves his worth by using his unique perspective. Since he can't hear, he becomes extremely observant of body language. This helps him in battles and also in understanding the true feelings of people around him. He could also form a special bond with a character who is also an outcast, perhaps someone with a disability of their own, and together they change the perception of the village towards those with differences.
Another plot could be that Naruto is adopted by an older ninja who has retired from active duty. This ninja has a lot of wisdom and secrets. Under his guidance, Naruto discovers a new power within himself that was hidden all along.
One idea could be Naruto going back in time and meeting his parents when they were young. He could try to prevent their early deaths or change certain events that led to the hardships in his own life. Another plot could be Naruto ending up in the time of the First Hokage, and learning the original ninja ways that were perhaps lost or changed over time. He might also have to deal with the different political situations of that era.
One idea could be a crossover where Naruto's skills are combined with Ori's abilities in the Blind Forest. For example, Naruto could use his shadow clone jutsu to help Ori solve puzzles or fight off enemies more efficiently.
A possible plot could be that both Naruto and Hashirama are reborn simultaneously. They might team up to face a new, powerful enemy that even the combined forces of the Hidden Leaf couldn't handle before. Since Naruto has his Uzumaki chakra and Hashirama has his Senju power, together they could create new and powerful jutsu. For example, Naruto's chakra could enhance Hashirama's Wood Style to cover larger areas or be more durable.