Another idea is that Jiraiya's son time - travels to a crucial point in Naruto's life, like when he was struggling to control the Nine - Tails' power. He could use his own special abilities, which might be a combination of Jiraiya's and some unique genetic traits, to help Naruto master the power more quickly. This would make Naruto a much more formidable ninja earlier in the story and could lead to different outcomes in battles against the likes of Nagato and Madara.
Maybe the son time - travels to a time when the Akatsuki was first formed. He could infiltrate the group and try to undermine their plans from within. Since he has knowledge from the future, he would know their motives and weaknesses. He could also try to turn some of the Akatsuki members, like Itachi, to the side of good earlier, which would completely change the power balance in the Naruto universe.
One possible scenario in such a fanfiction could be that Jiraiya's son discovers a forbidden jutsu that allows him to time - travel. He decides to go back in time to prevent some great tragedies in the Naruto world. He might try to stop the Uchiha massacre, which would change the whole dynamic of the story. This could lead to different alliances and power structures, as Sasuke wouldn't have the same motivation for revenge.
Well, in this fanfiction scenario, perhaps Jiraiya's time travel is an accident. His son could be a half - breed, part - something special like a jinchuriki of a new tailed beast. Jiraiya then has to use his knowledge from the past and new skills he learns in this timeline to protect his son and the village from those who want to use the son's power for evil.
One possible plot could be that Harry is raised in the ninja world. He discovers his magical abilities gradually while also learning ninja techniques. Maybe he uses his magic to enhance his ninja skills, like using spells to make his shuriken fly faster or more accurately. And he has to face the challenges of both the magical and ninja worlds, such as dark wizards and rogue ninjas.
Jiraiya would likely become more protective. He has always been a bit of a free spirit, but with a son in the picture due to time travel, he would be more cautious. His focus would shift from just his own adventures and spying to ensuring his son's safety and growth.
One possible plot could be that Jiraiya is forced to betray Naruto due to some external threat. Maybe an enemy has captured Jiraiya's loved ones and threatened to kill them if he doesn't turn on Naruto. Jiraiya, in a difficult position, might have to pretend to be against Naruto to protect his loved ones while secretly trying to find a way to free both Naruto and his family from the enemy's clutches.
Well, one possibility is that Naruto would grow up with more focused and intense training. Jiraiya could pass on his unique jutsu more directly. Maybe Naruto would learn about the world outside of Konoha in a more in - depth way earlier on, traveling with Jiraiya and having adventures that shape his understanding of the ninja world and his place in it.
The plot could revolve around Naruto and Jiraiya going on a secret mission together. During this mission, Naruto discovers more about his family's past through Jiraiya's knowledge. They might encounter an ancient evil that was known to Naruto's parents, and Naruto has to use the skills he's learned from Jiraiya to combat it.
One potential plot twist could be Naruto having a natural aptitude for medical ninjutsu from Tsunade, which could change his training and how he approaches battles. Another could be that his relationship with Orochimaru is different, as Jiraiya and Orochimaru have their own history. Maybe Orochimaru would see Naruto as a more direct threat or as a potential ally to sway to his side.
Well, one possible plot could be that Naruto is lost in a dangerous forest after a mission gone wrong. Jiraiya, who just happens to be passing by, discovers him. Jiraiya then decides to take Naruto under his wing for some special training. He might teach Naruto some new and powerful jutsu that Naruto hadn't learned at the academy. This could lead to Naruto becoming much stronger and more confident in his abilities.
One possible plot twist could be that Naruto and Jiraiya travel back to a time when the Uchiha clan was at its peak. This would put Naruto in a position to potentially prevent the Uchiha massacre. He could use his knowledge of future events and his skills to change the course of history for the better. Jiraiya, on the other hand, could discover secrets about the Uchiha that were lost over time.