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.
In this kind of fanfiction, it could lead to some really interesting power dynamics. Naruto might gain new abilities or have a different understanding of his powers at a younger age. Maybe he could use the power of the Juubi to protect the village in ways he couldn't before in the original story.
In fanfiction, this concept would have a huge impact. Naruto's growth would be different. He would have to deal with the power of the Juubi at a time when he is still developing his own identity. This could lead to a different Naruto, one who is more mature in some ways and yet still retains his naivete in others. The story could also explore how the village and its people react to this new Naruto. Some might fear him, while others might see him as a new hope. And in battles, Naruto could potentially defeat enemies much quicker, which would change the overall plot of the Naruto universe in fanfiction.
In this fanfic, Naruto might use his time - traveling jutsu accidentally. He could then see his younger self in a dangerous situation, like being attacked by a powerful enemy. So, he jumps in to save him, using all his advanced skills and knowledge. Maybe he also gives some important advice to his younger self to avoid future mistakes.
Well, Naruto's relationship with the villagers would be quite different. Instead of being the outcast he was as a child, he could use his knowledge of the future to show his worth early on. This might lead to more positive interactions with the villagers. And his relationship with his friends like Shikamaru and Choji could also be enhanced as he could introduce more interesting things to them at an earlier stage.
His older self might become more nostalgic. Meeting his younger self would remind him of his more innocent days. He could become a bit more carefree again, like he was when he was younger.
Maybe Kabuto. He's a sly character who often works for the more powerful villains. He could be sent to capture Naruto's younger self for some experiment or to gain information. Naruto would need to fight against Kabuto's medical ninjutsu and his sneaky tactics to save his younger self.
Well, it could be that Deku's younger self is initially in awe of his future self. They might start training together, with the older Deku showing the younger one new moves and ways to improve his skills. Also, the older Deku could tell stories about his battles and how he overcame various villains, which would give the younger Deku more confidence.
In a fanfiction like this, Orochimaru could train Naruto in the ways of stealth and assassination, skills that Orochimaru is quite proficient in. Naruto would initially be hesitant but realizes that these skills can be used for good. For example, to infiltrate enemy bases and gather intelligence to prevent wars. This would change Naruto's fighting style and make him more versatile in the shinobi world.
One possible theme is self - discovery. The older Deku has already gone through a lot of growth, and by meeting his younger self, he can see how far he has come. The younger Deku can also start to understand his potential better.