Perhaps in this fanfiction, Naruto discovers a hidden part of the ninja world that is wild and untamed. He becomes a sort of protector of this area, fighting against those who want to exploit it. His wild man nature allows him to adapt quickly to this new environment, with its own set of rules and challenges. He might also learn ancient and forgotten ninja techniques from this wild place, which he then uses to become an even more formidable ninja.
One possible plot could be that Naruto discovers a mysterious technology similar to Ant - Man's suit. He then uses it to shrink himself and infiltrate hidden enemy bases in the Naruto universe. He could use his ninja skills in combination with the shrinking ability to outwit his foes.
Sasuke could be one. He might be intrigued or even challenged by Naruto's new wild ways. Their rivalry could take on a new dimension as Sasuke tries to understand what has changed Naruto so much.
One possible plot could be Naruto, being a big Spider - Man fan, tries to incorporate Spider - Man's moves into his ninja techniques. He might start by training in ways that mimic Spider - Man's agility, like swinging between trees in the forest of Konoha as if he had webs. And he could even create his own version of a web - like weapon using his chakra.
Well, it could be about Naruto somehow having to control or deal with the power of the Ten - Tails. Maybe he has to fight an enemy who also wants to harness that power.
In a 'Naruto Reincarnation of Spider - Man' fanfiction, the story could start with Naruto being sent to the Spider - Man universe for some unknown reason. Once there, he realizes he has Spider - Man's powers. He might use his Naruto - like determination to fight crime in a different way than Peter Parker. For instance, instead of just relying on his webs, he could use his shadow clone jutsu to confuse criminals. He could also make friends with the Avengers, who are intrigued by his ninja abilities, and together they could face threats that are bigger than what either world has faced before.
Well, one possible plot could be that Naruto is somehow the son of Iron Man in an alternate universe. Maybe Tony Stark discovers a portal to the Naruto world and has an adventure there, falls in love with a kunoichi, and Naruto is the result. Naruto could then inherit some of Stark's technological genius along with his own ninja skills, creating a whole new set of abilities for him to use in battles against the Akatsuki or other threats.
One possible plot could be that Naruto is transported to the Marvel universe and somehow bonds with the Iron Spider technology. He then returns to the Naruto world with these new powers. His friends are initially confused but soon realize how useful his new abilities are in their battles against the Akatsuki. Another idea is that a mad scientist in the Naruto world creates a device that gives Naruto Iron Spider - like powers, and he has to keep it a secret while using it to protect his village.
Well, the plot could be that Naruto is the sole survivor after some kind of apocalyptic event. Maybe all the other shinobi were wiped out by a powerful enemy or a deadly disease. Naruto then has to find a way to rebuild the world while also dealing with his loneliness and the memories of his lost friends.
A plot could involve Saitama ending up in the Naruto world. He quickly realizes that the power levels here are different. He may get involved in the ninja wars, using his one - punch ability to end battles quickly. Naruto, intrigued by Saitama's power, tries to figure out how he can achieve such strength. Meanwhile, the villains in the Naruto world start to fear this new, extremely powerful intruder.
Well, it could be about Naruto having some sort of special connection with the old man of the mountain. Maybe he discovers some ancient power or knowledge related to it. For example, the old man of the mountain might teach Naruto a unique jutsu or give him a task that will change the course of the ninja world.