One interesting concept could be the idea of Naruto having a past life as a powerful ninja from an ancient clan. Maybe he had different jutsu or abilities that he unknowingly carried over into his current life.
One interesting concept could be how Naruto's past life memories change his relationships. For example, if he remembered being a great warrior in his past life, he might approach his training with Sasuke differently, seeing it as more of a friendly rivalry between two equals from different lifetimes. Another concept could be how his past life knowledge affects his view of the ninja world. Maybe he has memories of different forms of chakra usage that were lost in the current era, which could lead to him revolutionizing the way ninjas fight.
One interesting concept could be how the characters' relationships might change if they are sent back in time. For example, Naruto might use his future knowledge to prevent certain tragedies from happening to his friends, like Sasuke's fall to the dark side. This could lead to a completely different dynamic between them.
One interesting concept could be the idea of the characters from Naruto experiencing different game - like scenarios. For example, they might face challenges similar to those in RPGs, like leveling up their skills in new and unique ways. Another concept could be the fusion of Naruto's world with different game genres, such as survival games. This would add a whole new layer of excitement as the characters have to adapt to different rules.
Some fanfictions might explore the idea of Naruto's life shifting in terms of his social status. Instead of being an outcast in the beginning, he could be born into a powerful and respected family. This would lead to different character developments and interactions with other characters like Sasuke and Sakura.
A great concept in such fanfiction is the moral dilemmas. Just like in Life Is Strange, where choices had consequences, in the Naruto world, these could be even more complex. For instance, if a character has the power to change time, should they use it to bring back a dead Hokage? This would bring up questions about the natural order of things in the Naruto universe and how far one should go to change fate.
One interesting concept could be how Harry's past - life memories influence his relationships. For example, if he remembered a past life as a powerful wizard, he might be more confident in dealing with his friends or enemies. Another concept could be how these memories affect his understanding of magic. Maybe he discovers new spells or magical theories from his past - life knowledge. Also, it could change his view on the wizarding world's history and his place in it.
Another aspect could be Naruto's mental state. As a perfect life form, he might have perfect emotional control. He is no longer impulsive but can think clearly in every situation, which changes the way he approaches problems and interacts with his friends and enemies. This makes for a very different Naruto from the one we know in the original story.
One interesting concept could be time - loop travel. In past travel fanfiction, characters might find themselves stuck in a repeating cycle of past events, and they have to figure out how to break it. For example, in a story set in a historical era, a character might keep reliving the same day of a significant battle, and through their repeated attempts, they learn more about the true nature of the battle and the people involved.
Some fanfictions might explore the idea of Naruto befriending an Espada. This friendship could lead to Naruto learning about different ways of combat and power management from the Espada. It could also result in the Espada having a change of heart due to Naruto's positive influence, and together they could face new threats in the Naruto universe that neither could face alone.
In Naruto fanfiction, the Sharingan is often explored in unique ways. For example, some fanfictions might expand on its ability to not only copy jutsu but also to predict an opponent's moves on a whole new level. Another interesting bloodline concept could be the Uzumaki's massive chakra reserves, and fanfictions may play with how this could be used in different scenarios, like creating entirely new jutsu.