Well, one possible plot could be that Naruto is somehow transported to the Star Wars universe. The Jedi sense his strong force potential within him, which is similar to his chakra in his own world. They decide to adopt him and train him in the ways of the Jedi. He might struggle at first with the different concepts and rules, but his determination from his ninja training helps him adapt quickly.
Obviously, the Jedi who adopt Naruto would be main characters. For example, a Jedi Master like Obi - Wan Kenobi could be the one to discover Naruto and take him under his wing. Another could be Yoda, who would be very interested in Naruto's unique abilities and would play a role in his training. There could also be other young Jedi trainees who become Naruto's friends or rivals during his time at the Jedi temple.
Well, it might be about Naruto somehow ending up in the Star Wars universe and being the last Jedi. Maybe he uses his ninja skills combined with Jedi powers to fight against the Sith or some new dark force.
Well, in a 'naruto x jedi harem fanfiction', the plot might involve Naruto accidentally stumbling into a Jedi temple. The Jedi initially see him as an oddity but soon realize his potential. As for the harem part, the female Jedi, attracted by Naruto's determination and his different way of looking at things, form a sort of bond with him. They all then have to face a common enemy that threatens both the ninja world Naruto comes from and the Star Wars galaxy.
Well, in this fanfiction scenario, the Jedi Council could betray Naruto because they misunderstand his ninja way. The Jedi are all about peace through control and discipline, while Naruto is more about passion and believing in others no matter what. This clash of ideologies could lead the Council to think Naruto is a danger, so they betray him, perhaps by trying to imprison him or strip him of his powers.
In a 'naruto adopted by hiruzen fanfiction', the plot could involve Naruto having a closer bond with the older generation of shinobi. Hiruzen would surely introduce Naruto to his trusted comrades. Naruto could learn unique jutsu from them. Also, his growth as a ninja would be different. Instead of seeking attention through pranks, he might focus more on living up to Hiruzen's name. His relationship with Sasuke could also be affected. Maybe they would become rivals in a more positive way, with Naruto having a stronger sense of family and purpose because of Hiruzen's influence.
Well, perhaps in this 'naruto adopted by grayfia fanfiction', Naruto's own world is in chaos and he gets lost in a portal that leads him to Grayfia's realm. Grayfia sees Naruto's potential and loneliness. She adopts him and starts to train him in the ways of her world. Naruto could struggle at first, but his determination from his ninja training helps him. He might get involved in local disputes or power struggles in Grayfia's world and use his unique abilities to make a difference.
If Naruto was adopted by Tsunade in fanfiction, he would probably be exposed to a different set of values. Tsunade is a strong - willed and sometimes reckless woman. Naruto could pick up on her fearless attitude towards battle and also her more practical approach to leadership. Also, their relationship might change the power dynamics in the village a bit, as Naruto would be directly under Tsunade's wing.
Well, one possible plot could be that Naruto, being adopted by Yugito, would learn a lot about the Nibi (Two - Tails) from her. Yugito could train Naruto in unique ways that combine the skills of Konoha and her own special techniques related to the tailed beast. Naruto might also gain a new family - like bond with Yugito, which could help him deal with his own feelings of loneliness from his past.
The plot could involve the Mizukage adopting Naruto as a way to protect him from certain threats in Konoha. Naruto then grows up in the Hidden Mist village, making new friends and rivals. He could also have an influence on the village's view of Jinchuriki. Since he is a Jinchuriki himself, he might be able to change the negative perception that the Hidden Mist has towards those with tailed beasts inside them, and together they could work towards a more positive future for Jinchuriki in general.
The plot could involve Naruto being adopted by demons after some sort of tragedy. The demons could see his strong will and decide to make him one of their own. He would then grow up with a different set of values compared to regular ninjas. He might struggle with his identity, not fully belonging to the demon world or the ninja world. He could use his new demonic abilities to protect both the demons and his ninja friends from a greater threat that neither side could face alone.