One idea could be that Jiraiya focuses on Naruto's rasengan training in a more extreme way. He takes Naruto to a secluded place full of natural challenges like strong water currents or rocky terrains. There, Naruto has to constantly adapt and use his rasengan in different situations to overcome obstacles. Another plot could involve Jiraiya teaching Naruto some secret clan jutsus that he discovered during his travels, which could give Naruto an edge in future battles. And also, Jiraiya could train Naruto in stealth and espionage skills, which are essential for a shinobi but Naruto hasn't had much focus on before.
A possible plot is that Jiraiya trains Naruto to better control the Nine - Tails' chakra. He uses some ancient sealing techniques he learned to create a special training ground where Naruto can safely practice drawing on the Nine - Tails' power without losing control. This training also includes mental exercises as controlling the Nine - Tails is not just about physical strength. Another aspect could be Jiraiya teaching Naruto about different types of chakra natures and how to combine them in new and powerful ways, similar to how he has seen other great shinobi do during his adventures.
One idea could be Hiruzen teaching Naruto some of the most secret and powerful jutsu in the village. For example, a special fire - style jutsu that was once used by the First Hokage. This would give Naruto an edge and also show the bond between him and Hiruzen. Another plot could be Hiruzen training Naruto in the art of political leadership. Since Naruto is destined to be a great leader, Hiruzen could impart his wisdom on how to handle different clans and political situations within the village.
One possible plot development could be that Naruto quickly masters basic chakra control under Jiraiya's strict training. This early success might make Naruto overconfident, leading to a challenge where he realizes he still has a lot to learn. For example, he might face a powerful opponent in a sparring match arranged by Jiraiya and struggle initially, teaching him the importance of continuous training.
One idea could be that Hashirama teaches Naruto some long - lost wood - style jutsu. Maybe Hashirama shows Naruto how to use wood - style for more than just combat, like for building and healing in the village.
One unique method could be training in extreme environments. Jiraiya might take Naruto to a desolate desert or a freezing tundra to test his endurance and ability to adapt. This forces Naruto to find new ways to use his chakra and skills.
One plot idea could be that Naruto decides to follow in Jiraiya's footsteps as a spy. He disguises himself and infiltrates an enemy organization. Just like Jiraiya, he has to gather intelligence while also being careful not to blow his cover. Another idea is that Naruto starts his own training school in the style of Jiraiya, teaching a new generation of ninjas his unique techniques and the values he learned from Jiraiya.
One plot idea could be that in an alternate universe, Fem Jiraiya is Naruto's mentor instead of the male Jiraiya. She could teach him some unique jutsu that are different from the original. Another idea is that they go on a journey together where Fem Jiraiya has a secret mission related to Naruto's heritage and they gradually develop a deep bond. Maybe she has a different approach to training Naruto, focusing more on his chakra control from the start which gives Naruto an edge in his development.
Well, perhaps there could be a plot where they both get trapped in a mysterious dimension. In this dimension, they have to rely on each other's skills. Jiraiya's knowledge of sage mode and Orochimaru's various jutsu could be combined to find a way out. It could also explore their relationship in a more in - depth way as they face different challenges together.
One possible plot idea could be that Madara sees Sakura's potential in medical ninjutsu and trains her to combine it with combat in unique ways. For example, she could learn to use her medical chakra to enhance her physical attacks or to disrupt an opponent's chakra system more effectively during battle.
One idea could be that Genma is tasked with training Sakura in a special form of combat. He takes her to a secluded place and teaches her unique jutsu. Along the way, they face various challenges that test not only Sakura's physical skills but also her mental strength.
The training makes Naruto more confident in his abilities. Jiraiya constantly challenges Naruto and as Naruto overcomes these challenges, he realizes his own strength. He starts to believe in himself more, which is evident in the way he faces stronger opponents without hesitation later on. Also, Jiraiya's teachings about the ninja way and the importance of protecting those you love make Naruto more determined and focused on his goals.