What could be the plot of a 'naruto hears voices fanfic'?

It could be his parents. Minato and Kushina might be trying to communicate with him from the afterlife. They could be sharing family secrets or just giving him words of love and encouragement.

In this kind of fanfiction, the plot could be that Naruto starts hearing voices due to some dark jutsu used against him. Maybe these voices are from his past enemies, like Orochimaru, whispering in his mind, trying to break his spirit. And Naruto has to struggle to overcome these voices and not let them influence his actions.

It could be the Sage of Six Paths. Since Naruto has the power of the Nine - Tails and is on a path to becoming a great ninja, the Sage might be trying to communicate with him through voices, guiding him to fulfill some greater destiny.

It could be that Horton hears a story that has a lot to do with the color blue. Maybe there is a blue character in the story he hears that has some kind of adventure.

Well, it could be about Naruto somehow being transported to the world where Dimentio exists. Maybe Naruto's ninja skills would be a novelty there and he'd have to team up with Dimentio to face some common enemy. They'd learn from each other's abilities, like Naruto teaching Dimentio about chakra and Dimentio showing Naruto some unique magic tricks.

One possible plot for a 'naruto bankai fanfic' is that there is a prophecy in the Naruto world that a power from another realm will be the key to saving it from destruction. Naruto is chosen to seek out this power. He discovers the concept of Bankai in the Bleach realm. After many trials and training sessions with some friendly Shinigami, he unlocks his own version of Bankai, which combines his chakra and the spiritual energy of Bankai. With this new power, he unites the villages like never before as they face a common, extremely powerful enemy.

Perhaps the plot could start with Orochimaru experimenting with some strange new chakra that is actually the Venom symbiote. Naruto gets infected during a battle with Orochimaru's minions. With the Venom symbiote, Naruto has enhanced strength, speed, and a new form of stealth. But the symbiote also has a mind of its own and tries to make Naruto more aggressive. Naruto has to fight against this internal struggle while also facing external threats from enemies who want to use the symbiote for their own evil purposes.

The plot could involve a Naruto character, say Naruto himself, being chosen by a Valkyrie for a special mission in a different realm. This would take him out of his comfort zone in the Hidden Leaf Village. Along the way, he would learn about the Valkyrie's culture and powers, and they would combine their strengths to overcome various challenges and foes.

The plot could start with Naruto finding a strange magical object during one of his missions. This object could be related to the powers of Shazam. Once he touches it, he is suddenly transformed and gains Shazam's powers. He then has to figure out how to use these new powers while still being a ninja. He might face enemies who are after his new powers, and he has to protect his village from them.

Perhaps Naruto discovers some ancient power or prophecy that makes him the rightful emperor. He then has to deal with the political intrigue within the ninja world. Some might oppose his rule, thinking he's too young or inexperienced, while others see him as the savior. He'd have to build his court, choose his advisors, and face external threats from other lands that see a united ninja world as a threat.