In this fanfiction, Naruto might gain new powers. Since the Kyuubi is extremely powerful, being its son could mean Naruto has an even stronger connection to the fox's chakra. He might be able to access more of the Kyuubi's abilities without the usual struggle.
In some fanfictions, if Naruto becomes the Kyuubi, he might gain ultimate power. He could have the Kyuubi's full strength and abilities, like its massive chakra reserves. This could make him nearly invincible in battles. He might also change in appearance, perhaps having some Kyuubi - like features. For example, his eyes could turn red like the Kyuubi's, and he may grow claws or fangs. His personality could also be affected, becoming more ferocious and wild at times, but still having Naruto's underlying kindness.
Well, if Naruto becomes the Kyuubi in the fanfiction, he would likely have an overwhelming amount of power. He might be able to defeat his enemies with ease. But he would also face the struggle of controlling such a powerful and wild force inside him. Maybe his friends would be both in awe and a bit scared of him at first.
In this kind of fanfiction, Naruto might gain some special powers from the bond with Kyuubi. For example, he could have an even deeper connection to the chakra of the Nine - Tails, allowing him to access new forms or abilities more easily. Also, their relationship could lead to a change in how the village views Naruto. Since the Kyuubi has always been seen as a fearsome and powerful force, Naruto being its'mate' in the fanfic could make the villagers more in awe or even more fearful of him.
If Naruto becomes the Kyuubi in the multiverse fanfiction, the story could explore how the world views him. The Hidden Villages might see him as a threat and try to either contain or eliminate him. On the other hand, some might see him as a new form of hope. He could also encounter different versions of his enemies in the multiverse. For instance, a more powerful Orochimaru or a different form of Madara. This would force Naruto to constantly adapt and grow in his new state.
In some fanfics, if Naruto becomes Kyuubi, he might gain incredible power. He could have enhanced physical abilities like super strength and speed. His appearance might also change, taking on more Kyuubi - like features. Maybe his eyes would turn red like the Kyuubi's, and he could have a more menacing aura. This transformation could make him a more feared and respected figure in the ninja world.
As for Sasuke, he might view Naruto in a new light. He has always been interested in power, and seeing Naruto gain such a powerful connection could make him more intrigued or even more competitive. However, he might also be concerned about the implications for the village and the ninja world as a whole.
If Naruto becomes a mini Kyuubi in the fanfiction, it would be a huge change for him. He'd have to deal with new instincts that come with being part - Kyuubi. He might be more aggressive at times, but he'd have to learn to control that. His relationship with the other villagers could also change. Some might be more accepting since he's using the Kyuubi's power for good, while others might still be afraid. And his training would be different. He'd have to focus on mastering his new form and powers, which could involve some really cool new jutsu and fighting styles.
Well, he might face some challenges too. Other characters might be afraid or suspicious of his new form. They could mistake him for a threat, like when he first had the Kyuubi inside him. Also, Naruto would have to learn how to control this new mini Kyuubi form. It could be difficult as the Kyuubi's power is wild. But if he manages to control it, he could use it to protect the village in new and unexpected ways.
Well, one possibility is that Naruto could gain new and enhanced powers. As a kitsune, he might be able to use more advanced forms of fox - related jutsu. For example, he could have better control over illusions, like creating more complex and realistic ones. Also, his relationship with the fem Kyuubi could change. Maybe they would form a stronger bond, and the fem Kyuubi could teach him things about being a kitsune that he didn't know before. This could lead to Naruto becoming even more powerful and respected in the ninja world.
Well, he might be feared by everyone in that new world. Since the Kyuubi is a powerful and often feared entity in the Naruto universe, if Naruto turns into it, people would likely see him as a great threat. They might try to either capture or kill him.