In this fanfiction scenario, Naruto could potentially use new and untested jutsu. He might draw on the power of his nine - tailed fox in a completely different way. Maybe he'd combine Sage Mode with some secret Uzumaki clan technique he discovers during the fight.
In a fanfiction where Naruto revives Kaguya, it could lead to chaos. Kaguya was extremely powerful and her revival might put the ninja world in danger again. Naruto might have his reasons, like seeking more knowledge about the origin of chakra, but he would also have to face the consequences of bringing back such a powerful and potentially malevolent force.
In the 'naruto frees kaguya fanfiction', Naruto could free Kaguya through a series of events. Firstly, he might discover a hidden weakness in the seal that binds her. Then, he'd have to battle those who are protecting the seal. His Uzumaki blood and the Nine - Tails' power could play a crucial role. Once Kaguya is free, she may be grateful to Naruto and share some ancient knowledge with him, which could help in the development of the ninja world.
Well, Naruto would likely gain some really unique and powerful abilities. Since Kaguya is extremely powerful, she could teach Naruto some ancient and secret techniques that are not known in the normal ninja world. Maybe he'd learn more about the origin of chakra and how to manipulate it in ways he never thought possible.
Maybe an ancient evil ninja who was sealed away long ago but has now been released. This antagonist could have powers that nullify any communication or summoning jutsu, forcing Naruto to fight alone. He would be extremely powerful and know many forgotten and deadly jutsu.
In a 'naruto fights alone fanfiction', it could be that Naruto is on a mission in a foreign land where he has no support. The local ninjas are all against him for some reason. He has to use his Nine - Tails chakra in a more discreet way as he can't afford to go all - out and draw too much attention. He might befriend some local animals or spirits who help him in a more indirect way, like giving him information about the enemies' weaknesses.
One possibility is that Naruto's chakra nature could change completely. Since Kaguya had unique chakra, Naruto might develop new jutsu that are a blend of his own and Kaguya's abilities. For example, his Rasengan could gain the power to not only attack but also to heal, as Kaguya had some form of life - giving power. Also, his connection to the tailed beasts could be enhanced in unexpected ways, allowing for better communication and cooperation with them.
In fanfiction, if Naruto were Kaguya's reincarnation, his powers might become more complex. He could potentially have some of Kaguya's abilities like her dimension - hopping or her unique chakra control. This would make him an even more formidable opponent and change the power balance in the story.
In a fanfiction where Boruto fights Naruto, it could be a very emotional battle. Boruto might be driven by his desire to prove himself as a ninja independent of his father's shadow. He could use his unique jutsu, like the Vanishing Rasengan. Naruto, on the other hand, would bring his vast experience and the power of the Nine - Tails. It could end in a draw with both realizing the importance of family and understanding each other better.
Well, Naruto might use his unique jutsu like Rasengan in new and creative ways against the combined forces of the 5 nations. Maybe he would form new alliances within the 5 nations to fight against a common hidden enemy that threatens them all.
In this kind of fanfiction, Naruto might face a tough battle against the council. Maybe he's fighting for his own beliefs or to protect his friends. He could use his signature jutsus like the Rasengan to take on the council members who may have their own political motives and powerful techniques.