There could be a significant impact on his chakra control and power development. Naruto's heritage often has a connection to his chakra nature and abilities. If it's denied, he may not be able to fully understand or harness his powers. This could put him at a disadvantage in battles and missions. Additionally, his mental state could be severely affected. He may become more withdrawn, and his usually positive attitude could turn into one of bitterness as he grapples with the unfairness of having his heritage taken away from him.
One consequence could be a loss of self - confidence. His heritage has been a part of what has motivated him to become stronger. Without that connection, he may start to doubt his abilities.
He might feel angry and frustrated. Naruto has always been proud of his potential and his roots in some way. Being denied his heritage would be like taking away a part of his identity, so he'd likely be quite mad at those who are doing the denying.
One possible consequence could be a shift in the power dynamics within the village. With Naruto leaving, there might be a lack of his unique skills and leadership, which could lead to new challenges for Konoha in terms of defense against enemies. Another consequence could be the emotional impact on his friends and allies. They would likely feel betrayed or worried about his departure, and this could strain relationships. Also, Naruto's leaving might expose some hidden secrets or issues within Konoha's heritage that were previously overlooked, causing a stir within the village.
One possible reason could be the burden that comes with his heritage. Naruto's heritage is filled with great power and responsibility. Maybe he feels that he can't live up to the expectations of his clan or predecessors, so he rejects it.
Maybe he's been influenced by someone who has a different view of heritage. For example, if he meets a character who believes that one should create their own identity rather than relying on heritage, Naruto could be swayed. Another possibility is that he has some sort of resentment towards his heritage. Perhaps there are things in his family's past or in the traditions associated with his heritage that he doesn't agree with or is ashamed of.
In the fanfic, Naruto may learn of his heritage through a new character. Maybe a mysterious ninja shows up who has some connection to his family. This ninja could start to train Naruto in ways that are specific to his family's ninja techniques, revealing more about his heritage as they train together.
One possible plot twist could be that his heritage is linked to an enemy he thought was unrelated. So he has to reevaluate his views on the whole conflict.
In the context of the fanfic, it could also impact his relationships. His friends might be overly protective, which Naruto may not like. Or, he could inspire others with his determination to keep going despite his injury. It might also change how he is perceived in the ninja world. Some may see him as weakened, while others could view him as even more of a hero for his ability to persevere.
One consequence could be that his friends might start to suspect him. Since Naruto is usually an open book, hiding something as significant as his eye could make them wonder what he's up to.
Perhaps there are external threats that the village is facing. The leaders might think that Naruto is more valuable in his current position, where he can be used as a front - line fighter. They may believe that promoting him would mean taking him away from the direct combat and strategic roles that he currently excels at, and they can't afford to do that during a time of potential danger.
He might become more determined to prove himself to Tsunade. This could make him train even harder within the village. He could also start to question Tsunade's decisions and try to find ways to convince her that he is ready for such a training trip in the future.