Another plotline could involve Naruto's relationship with his previous family. How does he reconcile his feelings for Minato and Kushina with his new identity? And how do the spirits or memories of his old family interact with the new revelations about Hachishaku? This could be a very emotional and complex plotline that delves deep into Naruto's character and his sense of self.
One possible plotline could be Naruto struggling to come to terms with his new identity as the son of Hachishaku. He might face rejection from some in the village who are suspicious of his new heritage.
Perhaps there could be a plotline where Naruto discovers that his connection to Hachishaku gives him access to some ancient and powerful jutsu. This could lead to him having to master these new abilities while also dealing with the threats that come with having such power. It might also attract the attention of new enemies who want to either use him or stop him from using these powers.
In the 'Naruto son of Hachishaku' fanfiction, it could be interesting to see how the story weaves in the elements related to this new parentage. For example, if Hachishaku has certain unique traits or abilities, Naruto might inherit them. It could also lead to new relationships and conflicts within the Naruto universe, as his new origin might be met with various reactions from the other characters.
One possible storyline could be that Naruto's child in the fanfiction inherits some of his unique powers, like the Nine - Tails' chakra. And they have to learn to control it, with Naruto guiding them. Another could be that the child gets into trouble in the ninja world and Naruto has to use his influence and skills to protect them.
One possible plotline could be Naruto discovering his true heritage as Revan's son and having to deal with the new powers that come with it. Maybe he has some latent Force abilities in addition to his chakra.
One possible plotline could be Naruto having some of Beast Boy's shape - shifting abilities in addition to his ninja skills. He could use this to his advantage in battles, for example, turning into animals to surprise his opponents. Another plotline might involve Naruto trying to understand his dual heritage and how it affects his place in both the ninja world and the world where Beast Boy comes from.
One possible plotline could be Naruto growing up with Kakashi's unique training methods. Since Kakashi is known for his strict and strategic training, Naruto might become an even more formidable ninja at a younger age. He could inherit Kakashi's Sharingan abilities in some creative way in this fanfiction world, which would give him a whole new set of skills to master.
A possible plotline is that Kisame left behind a child (Naruto) before his death. Naruto is then raised in Konoha, but he has strange dreams and instincts that he doesn't understand. As he gets stronger, he starts to show abilities that are not typical of Konoha - style ninja. When he finds out about Kisame being his father, he decides to explore the Akatsuki's side of the story. He could try to understand why his father was part of such a group. Along the way, he might meet characters who knew Kisame and learn more about his father's past, which in turn helps him understand his own place in the ninja world.
One possible plotline could be Naruto having an innate understanding of the Wood Style jutsu due to his relation to Hashirama. He might discover this connection early on and struggle with the implications. Another could be that the village treats him differently, with some seeing him as a symbol of the Senju legacy, while others might fear his potential power.
One possible plotline could be Naruto discovering his true parentage as the son of Demeter. This could lead to a journey of self - discovery as he tries to understand his new powers related to nature. Maybe he has to hide this from his friends at first because he's not sure how they'll react.
One possible plotline could be that through some sort of magical or scientific accident, Naruto ends up in the One Piece universe and Zoro takes him under his wing, and over time Naruto is seen as Zoro's son - like figure. They could go on adventures together and Naruto would learn the ways of the pirates.
I'm not very familiar with this specific 'Hachishaku' fanfiction. But in general, if Naruto is made the father in a fanfiction, it could bring a whole new dynamic to the story. It might change the relationships of the characters involved and create unique plotlines centered around Naruto's role as a father.