Sasuke could potentially be an antagonist. Even though they were friends before, Sasuke might see Naruto's new fused power as a threat to his own goals or ideals. He could challenge Naruto, thinking that Naruto's power is getting out of hand. Another could be some remnants of the Akatsuki. They might be interested in Naruto's new power and try to either steal it or use it for their own evil purposes.
Well, a cool plot in this kind of fanfiction could be that the fusion allows Naruto to enter a new dimension or realm. In this place, he can communicate with past Hokages in a more profound way, getting their wisdom and also learning new ways to use his fused power. Maybe he discovers that the fusion gives him the ability to heal the land that has been damaged by previous battles. This would make him not just a fighter, but also a healer for the ninja world.
Well, Kurama might train Naruto by teaching him how to better control and access chakra. Since Kurama has a vast amount of chakra, it could show Naruto unique ways to harness and use it. For example, it could guide Naruto in creating more powerful and complex jutsu by using their combined chakra in a more efficient way.
The Kurama Brothers could be entities that have a similar origin to Kurama. They might have been part of the same chakra - based creation in the Naruto universe. They could possess some of Kurama's traits like great power and a connection to the natural energy in the world. They are often depicted as having their own personalities, with one being more hot - headed and the other more calm and calculating. Their relationship with Naruto usually involves them using their powers and knowledge to help Naruto grow as a ninja and a person. They might also have their own goals and motives that are intertwined with Naruto's journey.
Kurama might become angry at first. He's a powerful being and being neglected would likely wound his pride. He could start causing some minor disruptions inside Naruto, like making it harder for Naruto to access his chakra.
It might be portrayed as a very strong and almost spiritual connection. They could be shown as two halves of a whole, with Naruto relying on Kurama not just for power but also for emotional support and vice versa.
One way is through shared experiences. For example, they could go on a journey together outside the village. During this journey, they face challenges like bad weather, lack of food, and dangerous animals. As they overcome these challenges together, their bond grows stronger. Also, Naruto could introduce Kurama to his friends, and Kurama could learn to interact with humans in a more friendly way. This would show that their relationship is not just about being sealed together but about true friendship.
Naruto's self - confidence gets a huge boost. Kurama's teachings are like a seal of approval. If Kurama believes in him enough to teach him, then Naruto must be something special. This new - found confidence shows in his posture, his speech, and how he faces challenges. He no longer doubts himself as much when it comes to difficult tasks, whether it's a tough battle or a diplomatic negotiation within the ninja world.
It could develop as Naruto spends more time in the mental space where Kurama resides. They start to communicate better, understand each other's motives, and gradually form a deeper connection. This might involve Naruto learning about Kurama's pain and loneliness over the years, which makes Kurama more open to Naruto. As a result, their bond becomes stronger and more symbiotic, allowing them to share power more effectively and support each other in different situations.
The power balance would be greatly affected. If fanfiction gives Naruto some overpowered abilities like instant teleportation across any distance, it would make many of his battles much easier. Enemies that were once a threat would no longer be so.