What could be the plot of a 'naruto is ultraman' fanfiction?

One interesting crossover could be Naruto obtaining Ultraman's powers. Imagine him using the Spiral Zankai Beam instead of the Rasengan. It would be a powerful and unique addition to his fighting style.

Often, they start off as strangers. Ultraman characters might be confused by the ninja world's rules and customs, while Naruto characters are in awe of Ultraman's powers. For example, Naruto might be excited to learn about Ultraman's beam attacks and try to incorporate the concept into his own jutsu training.

The plot could also involve Naruto trying to convince the Raikage to change some of the Cloud Village's more isolationist policies. As Naruto has a vision of unity among all the ninja villages, he sees the Raikage as a key figure to help him achieve this. The Raikage, initially resistant, might gradually come around to Naruto's way of thinking as they spend more time together.

One plot could be that Yoruichi gets lost in the Naruto universe. Naruto finds her and, being the helpful person he is, offers to help her find her way back home. Along the way, they encounter various challenges. They might have to face off against some of Naruto's enemies who see Yoruichi as an unknown threat. As they overcome these challenges, they develop a bond. Yoruichi might teach Naruto some of her unique skills, and Naruto could show Yoruichi the importance of having a strong community, like his village, which is something she might not have in her own world.

Well, one possibility could be that Naruto somehow enters the world where Nnoitra exists. Maybe he's on a mission to understand a different kind of power system that Nnoitra has. And through their interactions, Naruto starts to learn new combat techniques and ways of thinking. He might also try to change Nnoitra's violent nature with his own ideals of friendship and perseverance.

Maybe Naruto discovers a mine that has some sort of chakra - related minerals. He then tries to mine them to help his village in some way.

One possible plot could be that Naruto somehow discovers the works or the world of Yamamoto. Maybe through a mysterious portal or a powerful jutsu gone wrong. And he becomes a huge fan, trying to incorporate Yamamoto's ideas or skills into his ninja world. For example, if Yamamoto is known for some strategic warfare, Naruto could try to apply those strategies to his battles against the Akatsuki.

One possible plot could be that Naruto somehow gets transported to the RWBY universe. He witnesses Qrow's skills in battle and becomes an instant fan. He then tries to learn from Qrow, and Qrow, seeing Naruto's determination, decides to train him a bit. This leads to Naruto adapting some of Qrow's fighting techniques to his own ninja style.

A simple plot could be that Hinata gets injured while on a mission, and Naruto takes it upon himself to nurse her back to health. During this time, they have long conversations and get to know each other on a deeper level, leading to the start of their romantic relationship.

In this fanfiction, perhaps Naruto's Anodite powers are a result of some sort of magical experiment gone wrong. His friends in Konoha are initially scared of his new powers. But as he learns to control them, he starts to use them to enhance his ninja skills. He might also meet other Anodites who help him understand his powers better, and together they could face threats that are endangering both the ninja world and the Anodite realm.