Well, one possible plot could be that Naruto discovers his connection to Mu in a hidden scroll. Maybe Mu had some long - forgotten powers or knowledge that Naruto then has to learn to use to save the ninja world from a new threat. For example, it could be a threat that only the combined bloodline of Uzumaki (from Naruto) and whatever Mu's family had can defeat.
One possible plot could be that Naruto discovers his connection to Anubis later in life. Maybe he starts having strange dreams or visions related to Anubis. This new heritage could give him unique powers, like the ability to control shadows in a more spiritual way, similar to how Anubis is associated with the afterlife. He could use these powers to fight new and more powerful enemies in the Naruto universe.
One possible plot could be that Naruto discovers his true heritage as Madara's grandson gradually. This revelation shakes his world as he has to come to terms with being related to a once - feared enemy.
The plot could involve Naruto exploring the history of his family. Since Hashirama was one of the founders of the village, Naruto might learn secrets about the village's origin that were previously unknown. He could also face challenges from those who oppose his new - found connection to Hashirama, thinking he might gain too much power or influence.
One possible plot could be that Naruto's demon - related powers start to surface unexpectedly. This causes chaos in the village as people fear him. He then sets out to find his true family roots among the demons. Along the way, he meets other demon - like beings who either help or hinder him. He has to learn to control his new powers and also tries to make the village understand that he's still the same Naruto they knew, just with a different background.
In this fanfiction, the grandson could be living in a time when the world is on the verge of a new kind of threat. He stumbles upon some old writings or artifacts related to 'K' that hold the key to stopping this threat. As he delves deeper into understanding what 'K' was all about, he realizes that he has to combine the old ways of 'K' with the new ninja techniques of his time. He might face opposition from some of the older ninja who don't believe in mixing the old and the new, but he perseveres and eventually saves the day.
Well, it could involve Naruto discovering his connection to the Third Kazekage and having to deal with the newfound family history. Maybe there are some secret jutsus or powers passed down from the Kazekage lineage that Naruto has to master.
Well, one possible plot could be that Naruto discovers his connection to Whitebeard. Maybe he inherits some of Whitebeard's powers or ideals. He could then use these newfound elements in the Naruto world. For example, Whitebeard's sense of loyalty and protection of his crew could translate into Naruto protecting his village in a new way. He might also face enemies who are after the power that he got from being related to Whitebeard.
Well, perhaps in this fanfiction, Naruto's grandson of Izuna Uchiha status is kept a secret from him for a long time. When he finally finds out, it causes a stir in the ninja world. He could then be targeted by those who fear the power he might inherit from Izuna. Meanwhile, Naruto has to struggle with his new identity and also deal with the expectations and threats that come with it.
One possible plot could be that Naruto discovers his true heritage and has to deal with the shock and the new expectations. He might face different reactions from the village, some seeing him as a threat due to his relation to Madara, while others might see him as a symbol of a new era because of his connection to Hashirama.
A possible plot could be that there is a prophecy about Naruto as the grandson of the Fem Kyuubi. This prophecy states that he will either save or destroy the ninja world. This would put a lot of pressure on Naruto and make his journey even more difficult as he has to prove himself to be the savior. Along the way, he might face enemies who want to either use him for his power or kill him to prevent the prophecy from coming true.