A possible plot is that Naruto has a secret stash of extremely rare and powerful ninja tools. He has been secretly learning how to use them to enhance his combat abilities. These tools could have been left behind by a great ninja from the past. Also, he might be secretly in tune with a natural energy source that no one else in Konoha has discovered yet, allowing him to draw on an almost limitless power reserve.
Well, a plot might be that Naruto has secretly made pacts with some powerful spirits or entities. These pacts give him extra strength but at a cost that he doesn't want others to know about. Or perhaps he has a secret mentor who has been teaching him advanced techniques far beyond what Konoha offers. This mentor could be from a far - off land and has seen Naruto's potential for true greatness.
In this type of fanfiction, a great plot idea could be that Naruto's female identity is tied to some sort of ancient prophecy. Only as a girl can she fulfill this prophecy which could involve saving the ninja world in a different way than in the original story. Her secrecy then becomes crucial not just for her own safety but for the fate of the entire world. And as she tries to keep her secret, she has to navigate the challenges of being a girl in a world that expects her to be a boy.
One possible plotline could be that Naruto has been secretly training with an ancient sage. This sage has taught him unique jutsu that no one else knows. For example, a jutsu that can manipulate time on a small scale during battles, which gives him an edge without others suspecting.
One plot idea could be Naruto being sent on a solo mission to a far - off land. He has to be quiet as he infiltrates an enemy stronghold because any noise could alert the powerful guards. Another could be that Naruto, in his strong and quiet state, is chosen to protect a valuable and mysterious object. He has to fend off attackers without making much noise to not draw more unwanted attention.
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.
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.
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.
Well, Sasuke being secretly a girl in a fanfic could have a plot where she is on a mission and gets injured. In the process of getting treated, she has to hide her true gender from the medical ninja. This could lead to some tense moments as she tries to avoid any situation that might expose her. It could also be interesting if there are other female characters who suspect something but are not sure, and they start to test Sasuke in subtle ways.
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.