In some smart dark Naruto fanfictions, there might be a storyline where Naruto is forced to use dark jutsu to save the village. For example, he might come across a powerful enemy that can only be defeated with a jutsu that has a dark and dangerous price. This could lead to internal conflict within Naruto as he struggles with the morality of using such power.
One unique storyline could be Naruto delving into the darker aspects of the ninja world on his own, without the support of his usual friends. Maybe he discovers a hidden conspiracy within the Leaf Village that involves some of the elders. This would make for a really interesting and dark take on the Naruto universe.
Well, in some dark One Piece fanfictions, there are storylines where the poneglyphs hold a dark secret that could destroy the world. Maybe instead of leading to the One Piece, they lead to a weapon so powerful that it could wipe out all of the seas. Also, a story where the devil fruits are actually a curse from an ancient and malevolent being, and those who eat them are doomed to a tragic end. There could also be a plot where the Grand Line is actually a prison created by a long - forgotten, evil civilization.
One unique storyline could be a samurai Naruto who has to protect a small village from a powerful warlord. He might use his ninja skills in a samurai - like way, like using his shadow clone jutsu to create decoys while he attacks the enemy head - on with his sword. Another could be Naruto being trained by a legendary samurai master, learning ancient samurai techniques that he combines with his own chakra powers.
One popular storyline could be Dark Naruto and Mikoto teaming up to face a common enemy. Maybe an ancient evil that threatens the Hidden Leaf. They combine their unique skills, Naruto's dark powers and Mikoto's Uchiha abilities.
One possible storyline could be that Naruto is betrayed by those he trusts most in the village. This heartbreak and sense of abandonment could lead him down a dark path. He might start to question the values he was taught and use his power in more self - serving and ruthless ways.
One possible storyline could be Naruto using his newfound quiet and smart nature to outwit his opponents in a different way than his usual brash self. For example, in a battle against a powerful enemy, he might analyze their moves quietly and come up with a strategic plan to defeat them without relying on his brute strength alone.
Maybe Naruto, being smart and having the Rinnegan, decides to use its power to heal the rifts between different ninja clans. He devises a plan to bring everyone together using the unique abilities of the Rinnegan, like the ability to control the tailed beasts in a more peaceful way. He uses his intelligence to persuade each clan that unity is the best option for their survival and prosperity.
One good example could be a fanfiction where Naruto's dark side emerges due to some past trauma and Ino, with her smart mind, tries to reach out to him. Maybe she uses her mind - reading jutsu in a unique way to understand his inner turmoil.
One possible unique storyline could be Naruto focusing more on his pure ninja skills without the power boost from being a jinchuuriki. Maybe he'd develop his own special jutsu that are not related to the tailed beast's chakra.
One unique storyline could be a forest mage Naruto who discovers a hidden grove in the forest that holds ancient chakra secrets. He then uses this knowledge to develop new jutsu that are nature - based and can heal the land as well as fight enemies. Another could be a forest mage Naruto who forms a bond with forest spirits and they help him in battles, granting him special powers like camouflage or enhanced speed among the trees. And there could also be a story where Naruto, as a forest mage, has to protect the forest from dark forces that want to destroy it for its powerful natural energy.
One unique storyline is when they are all turned into animals by a strange jutsu gone wrong. Naruto becomes a fox, Ino a deer, and Sakura a cat. They have to figure out how to reverse the jutsu while dealing with the challenges of being in animal forms, like finding food and avoiding predators.