A possible storyline is that Naruto accidentally stumbles upon a hidden dojo where Rokushiki is practiced. The dojo master, seeing Naruto's potential, takes him in as a student. As he learns Rokushiki, he has to face the challenges of combining it with his ninja skills. He might also face opposition from some of the other students who are jealous of his natural talent. This could lead to various conflicts and growth for Naruto's character within the fanfic.
Yes, there might be. Some fanfics like to give Naruto new abilities and having him quickly master Rokushiki could be an interesting plot point. Writers often enjoy exploring how a character from one universe would adapt to skills from another.
One possible storyline could be Naruto being possessed by a Devilman - like entity. His friends then have to find a way to free him while dealing with the new, more dangerous Naruto. Another could be Naruto willingly accepting Devilman - like powers to defeat a greater threat, but then struggling to control them.
One possible storyline could be Naruto discovers his true heritage early on and has to deal with the pressure of living up to Hagoromo's name. He might struggle with new expectations from the village and his friends.
One possible storyline could be that Naruto is kidnapped by a rogue ninja group who wants to use his power for their own evil deeds. They might try to force him to reveal the secrets of his special jutsu. Another could be that he is kidnapped by a mysterious organization that believes he is the key to a long - lost prophecy. They hold him captive while they try to figure out how to use him to fulfill the prophecy. A third storyline could be that Naruto is kidnapped by a group of enemy ninjas from another village who see him as a threat to their plans for domination.
One possible storyline could be that Tracer is on a mission in her Overwatch world and gets sucked into a portal that leads her to the Naruto universe. There, she meets Naruto and his friends, and they initially don't trust each other. But as they face common enemies, like some rogue ninjas who are after Tracer's technology, they start to work together and form a bond.
One possible storyline could be Naruto running away from the village. Since his family ignores him, he might feel like there's no place for him there. He could then go on a journey to find a place where he is accepted. Another storyline could be Naruto becoming a sort of lone wolf within the village. He trains in secret, away from everyone, and emerges as a powerful but mysterious figure. He might also start to form alliances with outcasts in the village who also feel ignored.
One possible storyline could be that the Si OC is a shinobi from a village that has been wronged by Konoha in the past. They see Naruto as a symbol of Konoha's power and thus direct their hatred towards him. For example, if their village was raided by Konoha in the past for some reason, they hold a grudge against all things Konoha, including Naruto.
Well, perhaps in the 'naruto abused by kushina fanfic', it could start with Kushina having a premonition of Naruto causing great harm in the future. So, in her attempt to prevent that, she goes overboard and starts abusing him. Or it could be due to some long - hidden family secret that makes her act out against Naruto, thinking she's doing the right thing for the family or the village in the long run.
In a fanfic, Tsunade's pregnancy might be a result of some sort of experimental medical jutsu gone wrong. Naruto could be the one to find a way to reverse it if she doesn't want the baby, or he could help her through the difficult pregnancy. He could also help protect her from those who might see her pregnancy as a weakness to exploit in the village.
Perhaps in the fanfic, Naruto loses his arm due to a curse or a forbidden jutsu gone wrong. His friends, like Sasuke, then try to find a way to either get him a new arm or help him come to terms with the loss. It could also show Naruto's journey to adapt to his new disability and still be a great ninja, inspiring the younger generation in the process.