One interesting plot idea could be the main character mastering a new and unique form of chakra control. For example, being able to combine different elemental chakra in ways not seen before in the Naruto universe.
Perhaps the story could focus on a character who is not Naruto becoming a Hiraishin master. They could struggle to be accepted in the ninja world because they're not from the Uzumaki clan but still manage to prove their worth with unique applications of the technique. For example, using it in combination with other elemental jutsus in ways no one has thought of before.
Perhaps the story could revolve around a Raiton master who has lost their memory. As they journey through the Naruto world, they start to regain bits of their past while also teaching others about Raiton techniques. They might have a special connection to a long - lost Raiton - based jutsu that could change the balance of power in the ninja world.
One idea could be Naruto using his pranks to outwit the Akatsuki members. For example, he could set up a series of fake traps that make the Akatsuki waste time and resources. Another plot idea might be Naruto pranking the villagers in a way that actually ends up bringing the community closer together. Maybe he stages a fake emergency that makes everyone realize how much they care about each other.
One idea could be a story where Naruto discovers he has the power to control all the elements in a completely new way. For example, he might combine wind and fire to create a unique attack that no one has ever seen before. Another plot could involve Naruto training with an ancient elemental master who teaches him secrets about the elements that were long forgotten. Maybe Naruto has to use his new elemental skills to stop a powerful enemy who is also an elemental user but is misusing their powers for destruction.
One idea could be the main character, who is a henge master, getting involved in a mission where they have to use their henge skills to infiltrate an enemy stronghold. They could transform into various characters to gather intelligence.
Perhaps a plot where a blade master is secretly an ancient shinobi from a forgotten clan in the Naruto world. The character could hold the key to unlocking a powerful jutsu that is related to blade manipulation. As the story unfolds, they must fight against those who want to use this power for evil while also rediscovering their true heritage.
One idea could be that Naruto discovers a strange portal that leads him to the Pokemon world. There, he befriends Pikachu and they start a journey together to become a Pokemon master. Naruto's ninja skills could come in handy during battles, like his shadow clone jutsu to create multiple distractions for the opposing Pokemon.
One plot idea could be Naruto's journey to master the Katon techniques. He might start with basic Katon jutsus and struggle to control the fire at first. For example, accidentally setting things on fire in the village while training. Another idea is that he discovers a new, powerful Katon technique that was lost in history and has to face off against enemies who also want to obtain it. Maybe he teams up with Sasuke, who has his own fire - related abilities, and they combine their powers in an epic battle.
One idea could be that the seal master from another universe comes to the Naruto world and teaches Naruto some ancient and powerful sealing techniques that were lost in the Naruto world. This could change the power balance in battles against the Akatsuki.
Perhaps the OC Seal Master is an outcast in their village because of their unique seal powers. They then get involved in a plot where they have to prove their worth by using their skills to protect the village from a mysterious threat. For example, an unknown force is causing seals all over the village to malfunction and it's up to the OC to figure out what's going on and fix it using their in - depth understanding of seal mechanics.