One possibility is that they team up to face a common threat that neither could handle alone. They might combine their skills and strategies in a unique way. Also, there could be some humorous moments, like when they argue about who is the'real' Naruto or who has the better taste in ramen. This kind of encounter would surely have a big impact on Naruto's view of himself and his world.
Well, in such a fanfic, Naruto might initially be confused. He could start comparing his own life experiences with those of his alternate self. Maybe they would exchange stories about their training, friends, and enemies.
Well, Naruto might try to give his younger self some advice. Maybe he'd tell him to train harder or to be more understanding of Sasuke earlier. It could be a really interesting scenario where the older Naruto tries to prevent some of the bad things that happened in his past from occurring again.
One interesting plot twist could be that the alternate Naruto is from a parallel universe where the roles of good and evil are reversed. This would force the real Naruto to question his own beliefs and values. And it might also lead to a battle between the two Narutos, not just a friendly encounter, as they fight over what is right and wrong.
In such a fanfiction, Neji might initially be in shock when he meets his alternate self. He could start to question his own life choices and beliefs. For example, if his alternate self has made different decisions regarding his loyalty to the clan or his relationships with other characters, it would force the original Neji to re - evaluate his own stance. Maybe they would even engage in a sparring match to test each other's skills, which could lead to a new understanding of his own abilities.
One interesting scenario in 'naruto meets his future self fanfiction' could be that Naruto's future self has a completely different appearance or set of abilities due to some unforeseen events in the future. This could shock the present Naruto and make him more curious about what the future holds. His future self could also share some secrets about the hidden powers within him that he hasn't discovered yet, leading to a whole new journey of self - discovery for the current Naruto.
In this 'Naruto meets his female self' fanfiction scenario, it could be that his female self has a different personality. She might be more in touch with her emotions. They could initially clash because Naruto is used to his own way of doing things. But then they might learn from each other. For example, Naruto could learn how to better handle his relationships from his female self, while she could learn his fearless attitude in battle.
In a fanfiction scenario where Naruto meets his younger self, it would be a very unique situation. Naruto might show his younger self some of the new jutsus he's mastered, like the Rasengan variations. His younger self would be eager to learn from him. Also, Naruto could talk to his younger self about his dreams and how he's still holding on to them, even after all the difficulties. This meeting could potentially change the course of his younger self's life, as he could be more determined to reach his goals faster with the knowledge of his future self.
Perhaps in this fanfic, Naruto would be confused by the concept of the Avatar at first. But as he gets to know more about it, he realizes the similarities between his world and the Avatar world in terms of protecting people. He might also have some interesting interactions with the different tribes in the Avatar world, like the Fire Nation. And who knows, he could even find a way to use chakra to enhance bending abilities.
In a 'Naruto meets aliens' fanfic, Naruto might use his ninja skills to fight off the aliens. He could use his Shadow Clone Jutsu to confuse them and then strike with his Rasengan.
Well, it could be that Naruto and Nagato initially engage in a fight as they have different ideologies. But then, as they talk more, they might find common ground. Maybe Naruto tells Nagato about his dreams for peace in the ninja world, which makes Nagato re - evaluate his actions. And Nagato could also share his past with Naruto, explaining why he came to his current beliefs.
A 'naruto meets kabuto fanfic' could start with Naruto sensing an unusual chakra signature which turns out to be Kabuto. Naruto would be ready for a fight, but Kabuto might hold up his hands in surrender. They could then have a conversation where Kabuto reveals some secrets about the past, like some hidden experiments of Orochimaru that could still pose a danger. Naruto might then decide to keep Kabuto under watch or try to convince him to use his knowledge for good.