One possible plot could be that Naruto goes to Kumo but is not well - received there. Maybe the people of Kumo are still suspicious of him because of his status as a Jinchuuriki. They could isolate him, and Naruto has to struggle to prove himself worthy of their trust. He might also face discrimination from some of the Kumo ninja.
Maybe in the fanfiction, Naruto neglected Kumo because he was too focused on his own village's problems. But then something major happens in Kumo, like a powerful enemy targets them. Naruto realizes his mistake and goes to Kumo to make amends. He teams up with the Kumo shinobi, and they work together to fend off the threat. Along the way, he learns about Kumo's unique culture and forms strong bonds with their ninja.
Another possibility is that there is a rogue ninja in Kumo who uses Naruto's neglected state to his advantage. He might try to manipulate Naruto into doing things that would be bad for both Naruto and Kumo, all while remaining in the shadows and making it seem like Naruto is acting on his own accord.
Well, it could be that Naruto, feeling neglected in his own village, decides to seek a new start in Kumo. Maybe he meets some unique characters there who accept him for who he is and he begins to train in their style of jutsu, thus becoming a stronger shinobi in a new environment.
One possible plot development could be that Naruto's friends in Konoha realize he's missing and start a search mission. They might suspect Kumo immediately due to the history of tensions between the two villages. Meanwhile, in Kumo, Naruto could be held in a secret location. Some in Kumo might want to use him as a bargaining chip against Konoha, while others might see his potential and try to turn him into an asset for Kumo.
In some fanfictions, Naruto might face new challenges in Kumo. He could encounter different ninja with unique jutsus. Maybe he has to prove himself all over again in this new village environment.
First of all, Naruto arriving in Kumo could disrupt the power balance there. Some might see him as a threat, while others as an opportunity. He could get involved in Kumo's internal politics. Since he's always been about making friends, he might try to bridge the gap between Kumo and Konoha, even though he was banished from Konoha. He could also discover secrets about Kumo that are related to his own past or abilities. For example, there could be some ancient Kumo jutsu that only he can master due to his Uzumaki heritage.
Naruto might meet some young and talented Kumo ninjas. They could be eager to test their skills against Naruto or learn from him. Maybe there are some unique characters like a Kumo ninja with a special bloodline limit that Naruto has never seen before.
In the 'naruto goes to kumo fanfic', Naruto could be on a mission in Kumo. He might make new friends or enemies. He could also learn new jutsu from the ninjas in Kumo. It could be a great opportunity for him to grow as a ninja and expand his understanding of the ninja world.
One possible plot twist could be that Naruto discovers a secret connection between his family and someone in Kumo. This could completely change his understanding of his past and future.
Well, one possibility is that Naruto could quickly rise through the ranks in Kumo. Since he was neglected at home, he might be more determined to prove himself there. He could form strong bonds with new friends and comrades in Kumo who actually value him, which would be a huge change from his situation in his original village.