He might learn some advanced chakra control techniques. For example, better management of his Nine - Tails chakra. Kakashi, being a skilled ninja, could teach Naruto how to blend his own chakra with the Nine - Tails' more effectively, which would enhance his combat abilities.
Kakashi's training style, which is often strict and methodical, would likely make Naruto more disciplined. Naruto is usually a bit of a wild card, but under Kakashi's tutelage, he would have to follow a set routine and be more precise in his actions.
Sakura could also be present. She might be observing the training and learning some things herself, or she could be helping Kakashi in some way, like providing medical support during intense training exercises.
She might learn some advanced jutsu. For example, Kakashi could teach her his famous Chidori, which is a very powerful lightning - style jutsu. This would significantly enhance Sakura's combat abilities.
It could make her more confident. With Kakashi's guidance, she would gain more skills and knowledge, which would boost her self - assurance in battles and in general ninja life.
Well, one interesting aspect could be the unique training scenarios it might depict for Naruto. It could show him training in ways that weren't explored in the original series, like training with long - lost techniques or under the guidance of unexpected mentors.
One possible plotline could be Kakashi teaching Naruto some super - advanced jutsu that Naruto then uses to surprise his friends in a sparring match. For example, Kakashi might teach Naruto a special lightning - style jutsu that Naruto masters and combines with his Rasengan.
Well, one possible plot could be that Naruto, having experienced so much growth himself, decides to pass on his unique ninja skills and values to a young Kakashi. He might teach Kakashi some of his signature jutsus like the Rasengan, but also lessons about friendship and never giving up. Naruto could also share his own experiences of dealing with loss and loneliness, which would be really interesting considering Kakashi's own past traumas.
Sasuke could be involved. Since they have a complex relationship, Sasuke might either be a rival during Naruto's training, pushing him to be better, or he could end up joining Naruto in some training sessions to become stronger together.
Their relationship would likely start off a bit rocky. Kakashi is a proud and skilled ninja even as a young boy, and Naruto coming in to train him might be seen as an intrusion at first. But as Naruto shows his genuine care and his own amazing skills, Kakashi would start to respect him. Eventually, they'd become like brothers, with Kakashi looking up to Naruto in some ways.