In this 'naruto the juubi crossover mass harem fanfiction', the plot might revolve around Naruto being thrust into a situation where the Juubi's energy somehow creates a harem around him. It could start with Naruto's battle against the Juubi. After some kind of encounter with the Juubi's power, female characters from various places start to flock to him. They could be attracted by his new - found power related to the Juubi or some other mysterious connection. Naruto would then be in a position where he has to balance his ninja duties, understanding the Juubi, and dealing with his new - found relationships.
Well, definitely Sakura. She has always been an important part of Naruto's life. Hinata is also a very possible choice because of her love for Naruto. In addition, if it's a crossover, there might be characters like Mikasa from Attack on Titan. She is a fierce fighter and might be drawn to Naruto's courage against the Juubi. There could also be characters from Naruto's own world like Ino, who has her own connection to Naruto and could be part of this mass harem.
Well, perhaps it could be about Naruto achieving a new level of power and attracting a group of female characters around him. Maybe they are drawn to his newfound connection with the Juubi's power and they form a sort of harem where they support him in his adventures and he has to navigate the complex relationships with each of them.
Well, it could be about Naruto having to face a new and more powerful form of the Juubi. Maybe the Juubi has some new abilities or is being controlled by a new villain. Naruto would then have to gather his friends and allies, train harder, and discover new powers within himself to defeat this new threat.
One possible plot could be that the Juubi from Naruto somehow breaks through dimensions and ends up in the Bleach universe. This could cause chaos as the spiritual energy in the Bleach world reacts to the Juubi's massive chakra. Ichigo and Naruto might team up to stop the Juubi. Naruto could use his sage mode and Rasengan techniques, while Ichigo uses his Bankai. They would have to learn to combine their powers and fighting styles to defeat the Juubi and send it back to its own universe.
Well, one possibility could be that Naruto, with the power of the Juubi, enters the DxD world. He might use his ninja skills and the Juubi's immense power to face off against the devils and other supernatural beings in the DxD universe. Maybe he forms alliances with some of the characters there, like Issei and his friends, and together they fight a common enemy that threatens both the ninja world and the DxD world.
The plot could involve the Juubi's chakra influencing some of the demons in the Inuyasha world. Naruto arrives and has to figure out how to stop this chaos. He might teach Inuyasha some of his ninja skills, and Inuyasha in turn could show Naruto how to deal with the demons. They could also find that the Juubi has some ancient connection to a powerful artifact in the Inuyasha world, and they have to stop an evil force from using this connection for their own gain.
Definitely Hinata. Since she has feelings for Naruto in the original series, she could be a part of the harem. Sakura might also be there as she is an important female character. From the Juubi - related side, maybe a female form of one of the tailed beasts. Also, Tenten could be included as she is a strong female ninja. And perhaps a mysterious female character who has a special connection to the Juubi's power.
A cool plot might be that a mysterious figure uses the concept of a harem to manipulate Naruto in the context of the Juubi. The harem members could be from different villages and have different abilities related to the Juubi's energy. Naruto has to figure out who is behind this manipulation while also dealing with his growing feelings for the members of the harem. He could discover that there is a deeper connection between the Juubi and the creation of this harem situation, and that by solving this mystery, he can prevent a greater disaster.
One possible interesting plot could be a crossover where a character from another universe gains the Juubi eye in the Naruto world. This new power could disrupt the balance of power, leading to alliances and rivalries being formed in new and unexpected ways.
One possible plot could be that the Juubi somehow gets transported to the Naruto world during a strange rift in space - time. Naruto and his friends have to figure out how to deal with this powerful and chaotic entity. They might initially try to fight it, but then realize they need to find a way to seal it again, like they did with the other tailed beasts. This could lead to new alliances and power - ups for the characters as they struggle to protect their world.