For Naruto, if Rikudou Sennin travels back in time, he could potentially train Naruto earlier. This would make Naruto much more powerful at a younger age and might change the way he faces his enemies like Sasuke. Naruto could also learn some ancient jutsu directly from the Rikudou Sennin.
Kakashi could be influenced as well. Rikudou Sennin could pass on some knowledge about Obito's situation earlier. This would allow Kakashi to better handle Obito's fall and might prevent some of the tragedies that occurred later. It would also change the way Kakashi trains Naruto and Sasuke.
Maybe he travels back to the time when the ninja clans were first forming. He could influence the way the ninja system is developed, for example, by promoting more peaceful co - existence among clans from the start. This would lead to a very different Naruto world where the concept of hidden villages might not even exist in the same way.
Yes, in some fanfictions, Naruto can be depicted as the Rikudou Sennin. Fanfiction writers often take creative liberties and come up with unique storylines where Naruto might inherit the powers or even be reincarnated as the Rikudou Sennin to explore different plot developments and character arcs.
Naruto himself is often a popular choice. Fans like to see him go back in time and use his future knowledge and skills to change things. Sasuke is also quite popular. His complex backstory and powerful abilities make for interesting time - travel scenarios. Another popular character is Kakashi. He has a lot of mystery and potential for development in time - travel stories, especially with his Sharingan and his relationship with Obito.
In fanfiction, the idea of Naruto being the son of Rikudou Sennin can be really interesting. It could change so many aspects of the story. For example, his relationship with other characters like Sasuke might be different. His power growth could also be explained in a whole new way. But we have to remember that this is just a fan - created concept and not part of the original Naruto story. The original story has its own well - established plot and character relationships that are different from this fanfiction idea.
One implication is that Naruto would have an extraordinary amount of power. He could potentially reshape the ninja world more easily. For instance, he might be able to end all wars and conflicts with a snap of his fingers.
In time travel fanfiction, if Jiraiya goes back, it can have a huge impact on his relationships. He may be able to save some relationships that were lost in the original timeline. For instance, he could repair his broken friendship with Orochimaru. Regarding his relationship with Naruto, if he travels back to Naruto's childhood, he can be a more effective teacher and friend. This could lead to Naruto trusting him even more. And if they travel back together, they rely on each other more in the different time period, which enhances their bond.
If they travel together through time, their relationship becomes more of a partnership. They have to rely on each other in a different time period. This shared experience of exploring different eras and facing challenges together can make their bond even stronger. They might discover new things about each other that they never knew before, like Naruto finding out how brave and resourceful Himawari can be in a completely unfamiliar situation.
It could be a powerful dark ninja who has discovered a way to tap into an ancient and evil power source. This ninja wants to use this power to rule the ninja world and sees Rikudou Sennin's rebirth as a threat to his plans.
If Minato time - travels, it could change a lot. For instance, if he prevents the Nine - Tails attack, Naruto would grow up in a very different environment. He might not be the underdog he was in the original story. Also, if Minato changes things during the Uchiha clan's situation, Sasuke's story would be completely different. Konoha's political situation would also be altered. There would be less animosity between different clans perhaps.
One common plot device is the alteration of major events in the Naruto timeline. For example, a time - traveling Naruto might prevent the Uchiha massacre, which would have huge ramifications for the entire shinobi world. Another is the transfer of knowledge from the future. The time - traveling character could introduce new jutsu or battle strategies that hadn't been thought of in the past. Also, there's often the theme of self - discovery as the character sees their past self or predecessors and gains a new understanding of their own path and purpose.