In the fanfiction, Naruto might neglect his heritage because he has a different goal in mind that he believes is more important. He could be so focused on achieving peace in a different way, like through uniting different groups without emphasizing heritage. He might also be afraid of the responsibilities that come with his heritage. If his heritage comes with a lot of power and leadership roles, he could be hesitant to take them on and thus choose to neglect it in order to avoid those burdens.
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.
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.
Naruto's neglect of his heritage can have a profound impact on the overarching theme of the fanfiction. If heritage represents a sense of identity and purpose in the Naruto universe, his neglect means he's sort of adrift. This can change the story from a typical 'coming - of - age - with - heritage' type to a more 'finding - oneself - despite - neglecting - heritage' plot. It could also lead to new character developments as he encounters different cultures or powers that make him reevaluate his decision to neglect his heritage.
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.
One reason could be that his siblings have some special abilities or talents that overshadow Naruto. In the ninja world, those with unique powers often get more attention. So, if his siblings possess something extraordinary, Naruto might be pushed to the side.
One possible reason could be that they are too involved in their own shinobi duties. The world of ninjas is full of dangerous missions, and they might be constantly away on important tasks, leaving Naruto feeling neglected.
In the fanfiction, when Naruto learns of his heritage, he often becomes more confident. Knowing where he comes from gives him a sense of purpose. He might start to train harder, believing that he has a greater destiny due to his lineage.
Well, it could strengthen his bond with some characters. For example, he might feel a closer connection to his clan members if he discovers his heritage. He could also gain new respect from his peers who now see him in a different light, perhaps as a more important figure within the village due to his lineage.
Maybe there are secrets in the family. For example, his parents might be involved in some dangerous and secretive missions that require them to keep their distance from Naruto to protect him, but Naruto misinterprets it as neglect.
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.
Well, it could strengthen his bonds. His friends might see him in a new light, with more understanding and respect. For example, they could realize the weight of his past and be more empathetic towards his struggles.