One possible plot could be that a character from Naruto with the Rinnegan somehow gets transported to the Inuyasha universe. Maybe they team up with Inuyasha and his friends to fight a common enemy. For example, the power of the Rinnegan could be used to counter some of the powerful demons in the Inuyasha world. The character might also introduce new jutsu or abilities to the Inuyasha gang, which could change the way they fight battles.
Sasuke would be an interesting character to cross over. He has the Rinnegan and a complex backstory. In the Inuyasha universe, his brooding nature and his powerful abilities would create a lot of interesting interactions. He could have a sort of rivalry with Inuyasha, as both are strong - willed and have a lot of power at their disposal. And his journey of redemption in Naruto could translate into a different kind of character arc in the Inuyasha world, perhaps learning to work with the half - demon Inuyasha despite their differences.
If Naruto got the Rinnegan, he might become more cautious. The power of the Rinnegan is so great that he would realize he needs to be more careful with it. He wouldn't be as brash as before.
A frequent theme is adaptation. When the Rinnegan is introduced into a crossover, characters have to adapt to this new power dynamic. For example, in a Naruto - Harry Potter crossover, the wizarding world has to adapt to the existence of the Rinnegan. Also, redemption can be a theme. A character who has misused the Rinnegan may seek redemption in the crossover story.
One common theme is the clash of different cultures. Naruto's world is more about ninja villages and modern - ish (for a fantasy world) structures, while Inuyasha's is a feudal era world. So when they cross over, there's often exploration of how these different cultures interact.
A main feature is often the overpowered nature of Naruto with the godlike Rinnegan. His abilities are enhanced to a level that allows him to do things like effortlessly defeat powerful opponents. Another feature can be the exploration of new jutsus or techniques that come with this form of the Rinnegan.
One popular 'godlike rinnegan naruto crossover fanfiction' might be 'Naruto: The Rinnegan God'. It combines the powerful concept of the Rinnegan in Naruto's world with a god - like twist. The story often delves into Naruto having enhanced powers due to a special form of the Rinnegan, leading to new and exciting adventures against powerful foes.
There's also 'Naruto and the Rinnegan Legacy'. This fanfic delves deep into the lore of the Rinnegan and how Naruto fits into it. It explores how Naruto uses the powers of the Rinnegan not just for fighting but also for unifying the ninja world. The character development in this fanfic is quite remarkable as Naruto has to adapt to this new power while still staying true to his original self.
Sesshomaru could also be a very powerful character in this crossover. He has his own powerful sword, Bakusaiga, and his inhuman strength and speed. He is very experienced in combat against demons. Compared to Naruto's friends like Sakura, Sesshomaru would likely be much more powerful in terms of raw strength and combat ability. But Sakura has her own medical ninjutsu and superhuman strength when she releases her inner power, which could also be useful in different situations.
Inuyasha's demon blood could interact with Naruto's Nine - Tails chakra. Since both are sources of great power, they might be able to create a unique power - up. Inuyasha could use the Nine - Tails' chakra to boost his speed and strength even further, while Naruto could learn from Inuyasha how to better control his inner 'demon' side. Their combined power could be used to break through powerful barriers or defeat extremely strong foes.