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.
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.
Friendship might be a theme. The older Naruto could emphasize to his younger self the importance of his friends, like Sasuke, Sakura, and Kakashi. Also, the theme of destiny. The older Naruto can tell his younger self that he has a great destiny ahead and should keep striving for it. And it could be about forgiveness too, as Naruto has had to forgive many of his enemies throughout his journey.
In a 'naruto meets his counterpart fanfic', a plot twist could be that the counterpart seems friendly at first but is secretly working for an enemy. Or perhaps the counterpart is a clone created by an old enemy of Naruto's with a different set of memories. It could also be that the counterpart has a connection to a long - lost part of Naruto's family that he didn't know about, which changes everything he thought he knew about his own identity.
The Jiongu could have a connection to Naruto's family that he was unaware of. Maybe it was something that his ancestors had encountered before. This discovery could change his perception of his family's history. Also, the Jiongu might seem like a great power at first, but it could turn out to be a double - edged sword. It could start to drain Naruto's life force or chakra over time, forcing him to find a way to either get rid of it or find a balance.
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.
A potential plot twist could be that Roger is actually a time - traveler. He came from the past to meet Luffy for a specific purpose, like to prevent a great disaster in the pirate world that only Luffy can help with in the future.
A potential plot twist could be that Naruto's hatred is actually a cover - up for his love. He might be pretending to hate Konoha and his family to protect them from a greater threat. Maybe there's an enemy who would target them if Naruto showed any affection, so he creates this false front of hatred.
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 potential plot twist could be that Esdeath, instead of being hostile towards Tatsumi, decides to protect him. This would be a huge shift as she is known for her brutality. It could be because she sees something unique in him that makes her want to keep him safe, which would completely change the way Tatsumi views her and the power dynamics between them.
One potential plot twist could be that Gine reveals that Goku has a special power that was hidden even from the Saiyan elites. This could completely change how Goku views himself and his capabilities.