In this fanfiction, perhaps Naruto's hidden jutsu legacy could be revealed. Maybe it shows some secret techniques that he developed but never got to show during the original series.
It could be revelations about Naruto's family heritage that was not fully explored in the original series. Maybe secrets about his parents' past deeds or hidden powers within his bloodline.
One interesting 'Naruto has heritage revealed' fanfiction could be where Naruto discovers a hidden clan connection. For example, he might find out he has ties to an ancient and powerful Uchiha - like sub - clan that was long forgotten. This could lead to new jutsu development and a whole new understanding of his place in the ninja world.
Naruto would surely be one of the main characters since it's about his heritage. There might also be his friends like Sasuke and Sakura as they react to the revelations about Naruto.
In 'dark naruto heritage revealed fanfiction', it might explore the idea that Naruto's heritage has been concealed for a reason. It could be that his true ancestry is linked to a dark prophecy or a powerful and dangerous bloodline ability. This discovery could set off a chain of events where Naruto has to either embrace or reject this new aspect of his heritage. He may find himself at odds with his friends and allies as they struggle to understand and accept this new Naruto, and he may have to face enemies who are interested in his new - found heritage for their own malicious purposes.
You can start by looking on fanfiction platforms like FanFiction.net or Archive of Our Own (AO3). These sites have a large collection of Naruto fanfictions, and you can use their search functions. Just type in 'Naruto has heritage revealed' and browse through the results.
Perhaps it reveals secrets about Naruto's family that were previously unknown. For example, there might be a connection to an ancient clan that was banished from the village long ago, and this fanfic explores how that heritage affects Naruto's character and abilities. It could also show some unique powers or items that are passed down through his banished heritage.
Iruka sensei could play an important role. He has known Naruto since he was a child and might be able to provide some insights or memories that are relevant to Naruto's newly - revealed heritage.
I'm not sure exactly as it depends on the specific fanfiction. But it might revolve around Naruto's departure and what he leaves behind for the village in terms of heritage, like his teachings or new ninja techniques.