He could also inherit some special genetic trait from his Uzumaki clan that was previously dormant. In the fanfiction, this latent trait could be awakened, giving him extraordinary powers. It could be something like the ability to heal at an extremely fast rate and also use that healing energy as a weapon by converting it into offensive attacks.
One possibility could be that Naruto discovers some ancient and long - forgotten ninja techniques. These techniques might give him powers similar to or even more powerful than the Kyuubi's. For example, he could find a scroll that teaches him how to manipulate natural energy in a unique way that no one has ever done before.
Another option is that Naruto has a strong connection with a different spirit or entity. Maybe there's a spirit of the wind that decides to bond with Naruto. Since he already has an affinity for wind - style jutsu, this bond could enhance his abilities to a great extent. He could then use the power of the wind spirit to create powerful attacks and defenses.
There's a fanfiction called 'Naruto Unleashed'. In it, Naruto starts from a very weak position without the Kyuubi's power. But he gradually finds his place in the ninja world by learning new jutsu from different clans. For example, he learns some earth - style jutsu from the Iwagakure ninjas he meets during a mission. His journey is more about self - discovery and building his own reputation.
Yes, there is 'Naruto's Independent Journey'. Here, Naruto has to face many more difficulties without the Kyuubi. But he also gets more opportunities to interact with other characters on a deeper level. For instance, he teams up with Shikamaru more often and they come up with some brilliant strategies together. It shows a different side of Naruto's relationships.
One possible storyline could be that Naruto decides to focus on traveling the world instead of becoming Hokage. He could use his skills to help people on a more individual basis across different villages. He might learn new jutsu from various shinobi cultures and become a sort of wandering hero.
His relationships with others would also change. For instance, his bond with Sasuke might not be as intense in terms of power rivalry. Since he doesn't have the Kyuubi, Sasuke may not see him as a threat in the same way. Naruto would probably have to work harder to prove himself worthy to his friends and the village. He'd be more of an underdog in a different sense, relying solely on his own efforts and natural talents rather than the Kyuubi's power, which would lead to a more humble and determined Naruto.
In some fanfictions, Minato could be Naruto's father in the context of the Kyuubi. Since Minato was Naruto's actual father in the original series and the Kyuubi was sealed within Naruto by Minato. So many fanfictions might expand on their relationship within the framework of the Kyuubi's presence.
There could be a fanfiction titled 'Naruto's Merciless Path'. In it, Naruto could be under the influence of a dark power or a really bad experience that changed his personality. He might start to be more aggressive and less merciful in battles, not hesitating to take extreme actions against his enemies.
One possible path is that Naruto becomes a traveling ninja, similar to Jiraiya. He could go around different villages and countries, learning new jutsus and making friends without the burden of leading a village. He might focus on spreading the message of peace in a more direct, personal way.
Well, the 'naruto full power of kyuubi fanfiction' might focus on the battles Naruto can have with his new - found power. He could be taking on stronger opponents that he couldn't face before. For example, he might be able to easily defeat some of the Akatsuki members who were once a great threat. Also, it could be about Naruto exploring the darker side of the Kyuubi's power and how he copes with it.
He could form relationships with other outcasts. People who also don't have a home or a place in society. They could band together and form a sort of 'family' of misfits.
Maybe they don't like fanfiction in general. It could be that they prefer the official, canon Naruto story. Fanfiction can vary greatly in quality, and they might have had bad experiences with some poorly written Naruto fanfictions in the past, which made them dislike the whole concept of Naruto fanfiction.