Well, it could mean that Naruto, having been ignored, is more receptive to Kaguya's training. He might learn to control chakra in ways he never thought possible. Kaguya, being an extremely powerful being, could help Naruto break through his limits. Maybe she'd train him in space - time ninjutsu, which would give him a huge advantage in battles. This would change the course of Naruto's life and his standing in the ninja world.
One possibility is that Naruto, being neglected by the village, would be full of pent - up anger and a thirst for recognition. Kaguya's training could focus on unlocking hidden powers within him. For example, she might teach him ancient jutsu that no one in the village knows. This could lead to Naruto developing a unique fighting style that combines his Uzumaki heritage with Kaguya's otherworldly knowledge.
In this fanfic, there could be a lot of character development for Naruto. Genma's training might not only be about physical skills but also about mental strength. Genma could share his own experiences in the ninja world, which would help Naruto understand the importance of strategy and patience. This could lead to Naruto becoming more of a well - rounded ninja, able to handle different situations more effectively than before.
Well, in such a fanfic, Naruto might gain some extremely powerful and unique abilities. Kaguya being his trainer could mean he'd learn ancient and forbidden jutsus. Maybe he'd also gain a deeper understanding of the chakra and the origin of the ninja world.
One possible plot could be that Naruto, under Kaguya's training, gains godlike powers at an accelerated rate. He might learn ancient and powerful jutsu that were once exclusive to Kaguya. This could lead to him facing new and extremely powerful enemies, perhaps even threats from other dimensions. With Kaguya's guidance, Naruto could also gain a deeper understanding of the chakra and its origins, and use this knowledge to reshape the ninja world for the better.
The Otsutsuki clan members other than Kaguya could be antagonists. Since Kaguya is training Naruto, they might see Naruto as a threat to their plans.
Well, Goku's training is intense. It might involve extreme physical conditioning like his gravity training. Naruto could be pushed to his limits in terms of strength and speed. He'd probably learn about ki control, which is different from chakra but could enhance his abilities. Goku might also teach Naruto about the importance of a strong mental state during battle, something Naruto already has a bit of but could be refined.
Well, the plot could involve Naruto being overlooked in his own village, so he somehow ends up in the world of One Piece where Zoro takes him under his wing. Zoro might start training Naruto in his unique sword - fighting style, which Naruto could adapt to his own ninjutsu - based combat. For example, Naruto could learn to use his chakra to enhance the speed and power of sword strikes, similar to how he uses it for his shadow clones or rasengan.
In this fanfiction, Naruto would likely have a huge power boost. Since Kaguya has such vast knowledge and power, she could train Naruto to better control his already massive chakra reserves. Maybe she'd show him how to use chakra in ways he never thought of before. For example, she could teach him to infuse his rasengan with some of her own unique chakra elements, creating a new and super - powerful attack. Also, Naruto's understanding of the origin of ninjas and the world itself could deepen through Kaguya's teachings.
The fanfic could also be centered around a character who is in possession of the Kubikiribocho and Naruto has to face off against them. It could explore themes like power, loyalty, and the consequences of using such a powerful weapon. There might be moral dilemmas for Naruto as he decides how to deal with the wielder of the Kubikiribocho.
It would probably involve a lot of cultural clashes at first. Naruto is from a more modern - minded shinobi society, while Kaguya has ancient roots. Their marriage might be about bridging those gaps, like Naruto introducing Kaguya to ramen and she introducing him to some of the more arcane knowledge of the old days.
Well, it could involve Naruto being overlooked or ignored by the village in this fanfic. And his relationship with Fem Sasuke could start as a form of mutual understanding. Maybe they find solace in each other because of their own issues. For example, Naruto's loneliness due to being neglected and Fem Sasuke's own complex past.