What are some interesting plotlines in 'Naruto appears in the past' fanfiction?

One interesting plotline could be Naruto using his future knowledge to prevent certain tragedies in the past. For example, he might stop the Uchiha massacre. Another could be him training his younger self more effectively, leading to a much stronger Naruto earlier on.

One interesting plotline could be exploring Naruto's early days of training with Jiraiya in more detail. Maybe showing his struggles and how he overcame them during that time.

Another plotline could be Naruto influencing the relationships between characters. He could try to bring Sasuke back to the village much earlier in the timeline, preventing a lot of the pain and conflict that occurred between them. Or he could help his parents, Minato and Kushina, in ways that would change the future of the entire Hidden Leaf village.

Well, a cool plotline might involve Ash going back in time to relive a crucial moment in his past but with new knowledge. This could lead to him making different decisions and changing the course of his relationships with his Pokémon and friends. Also, perhaps a plotline where Ash discovers a long - lost secret about his starter Pokémon's origin that has been hidden in the ashes of the past.

One interesting plotline could be Harry's parents' time at Hogwarts. Maybe exploring how they formed their friendships and dealt with the early signs of Voldemort's rise. Another could be about the Marauders' adventures that were not fully shown in the original books, like their secret pranks and how they influenced the Hogwarts of that time.

One interesting plotline could be the dragon riders exploring ancient dragon lairs in the past. They might discover long - lost dragon artifacts or secrets about the origin of dragons.

One interesting plotline could be the mystery behind the mask. Maybe it has some special power that only Naruto can unlock or it could be related to an ancient prophecy. Another could be a new villain who uses the mask to create chaos in the ninja world and Naruto has to stop him.

Perhaps Naruto discovers a new medical jutsu that combines his chakra control with traditional medical knowledge. This could revolutionize the medical field in the Naruto universe. He might use it to heal previously incurable diseases or injuries, and in the process, gain the respect of the medical community. This could also lead to some interesting interactions with other medical ninja, like Shizune or Tsunade.

Well, in some fanfics, there's a plotline where Hinata loses her memory and Naruto has to make her fall in love with him all over again. It's a classic but still very engaging. There are also stories where they are arranged to be married for political reasons at first, but then they actually fall in love for real during the process. And a really unique one is when Hinata becomes a super powerful ninja overnight and Naruto has to deal with his feelings of being a bit overshadowed while also being proud of her.

One interesting plotline could be Naruto joining the Akatsuki and trying to change it from the inside. He might use his ideals of friendship and peace to influence the other members who have mostly known a life of darkness and violence.