In the fanfiction, Naruto joining Kumogakure could be due to a prophecy. The seers in Kumogakure might have foreseen that Naruto's presence would bring great change and prosperity to the village. So, Naruto, being the selfless hero he is, decides to go there. Once there, he faces challenges from those who are skeptical of his arrival. But through his actions and determination, he gradually wins over the hearts of the villagers and helps Kumogakure become a stronger and more united village.
Maybe Naruto joins Kumogakure to form an alliance between it and Konoha on a more personal level. He could work with the Raikage to strengthen the bond between the two villages. This could involve Naruto taking part in Kumogakure's missions and proving his loyalty and worth to the village. In the process, he would make new friends among the Kumogakure shinobi and have to adapt to their different culture and way of life.
His relationship with Sasuke would become more complex. Since they are from different villages now, there would be a new dynamic. Sasuke might see Naruto's move as a betrayal to Konoha at first. But Naruto's intention could be to bridge the gap between the two villages for Sasuke's sake too.
Well, in this fanfiction, Naruto could join Esdeath in her military campaigns. Since Naruto has his own set of powerful jutsu, he could be a great asset. The plot could revolve around how Naruto adapts to the new world's rules and politics. He might be shocked by the harshness of Esdeath's world but still tries to bring some of his positive values. They could form an unlikely alliance, and Naruto's presence could start to change the power dynamics in Esdeath's territory.
One possibility is that Naruto joins Akatsuki to change it from within. He might think he can stop their more evil plans while also learning more about his own powers and the secrets of the ninja world that Akatsuki seems to be involved in.
Well, if Naruto joins Akatsuki in fanfiction, perhaps it's because he's disillusioned with the Hidden Leaf Village for some reason. Maybe he feels betrayed by them. In Akatsuki, he could form unexpected alliances. For example, he might bond with Hidan over their shared brashness in a way, and together they could influence the direction of Akatsuki's actions.
Maybe Naruto joins the Akatsuki with the intention of spying on them for Konoha. He could pretend to be on their side while secretly sending information back to his village. This would add a lot of tension and secrecy to the story as he has to constantly be careful not to be discovered.
Well, it could be about Naruto finding a new group to belong to. Maybe he's lost in a strange world and the horde takes him in. He might bring his ninja skills and unique values to the horde, causing all kinds of changes in their way of life.
In this fanfiction, Naruto could bring his sense of justice to the mafia. He may try to reform it from the inside, facing a lot of resistance from the traditional mafia members who are used to their old ways. His shadow clone jutsu could be used for things like gathering intelligence or creating diversions during mafia operations.
One possibility could be that Naruto goes to Suna to help them with a new threat. Maybe there's a powerful enemy that only Naruto's skills, like his Rasengan and shadow clone jutsu, can deal with. He then starts training some of the Suna ninjas in new techniques, leading to stronger bonds between Konoha and Suna.
One possible plot could be that Naruto goes to the Hidden Rain Village (Ame) seeking refuge or on a diplomatic mission. There, he discovers a new side of the ninja world, with different fighting styles and political intrigues. He might form alliances with some of the local ninjas and help them face a common enemy, perhaps an old foe that is threatening both Konoha and Ame.
The plot could be that Naruto is somehow transported to the Hellsing universe. He starts off as an outsider but quickly proves his worth. His rasengan could be adapted to be effective against vampires, perhaps by infusing it with holy water or some other vampire - weakening element. Naruto's presence could also introduce a new dynamic to the relationships within the Hellsing organization, and he might even form an unexpected bond with Seras Victoria as they both have a strong sense of loyalty and a desire to protect the innocent.