In Naruto, Kakashi's name can be said to have spread throughout the ninja world, no one knows the copy ninja Kiki Kakashi of Kiba Village, and in the Ninja War, Kakashi lost his writing wheel eye, and Kakashi disappeared throughout the ninja world with the end of the ninja war, leaving only the six generations of Naruto Kakashi known as "Kiki Go5kai".
In the Third Ninja War, Kakashi got this Writing Wheel Eye, and after this war, Kibamura also had two more heroes with Writing Wheel Eyes, and Kakashi made a name for himself in the entire ninja world with this Writing Wheel Eye, and Kakashi also copied thousands of ninjutsu, after all, the Writing Wheel Eye of the Uchiha clan was still a more perverted one among all the Blood Inheritance Boundaries.
But this writing wheel eye also has some side effects for Kakashi, that is, chakra's consumption is really too fast, Kakashi has been ridiculed as a ninja with a lack of blue, this is not a vacuum, kakashi every time he uses the writing wheel eye, after the end of the battle to rest for a long time, after all, he is not an Uchiha family, the use of writing wheel eye is still some side effects.
However, after losing the writing wheel eye, Kakashi didn't seem to have to worry about the consumption of Chakra, and at this time Kakashi could even be said to be very sufficient chakra, so the question was, if Kakashi could learn the flying thunder technique of the four generations of Naruto under such conditions? If so, would Kakashi be the next "yellow flash"?
First of all, the amount of chakra required to learn the Flying Thunder God Technique is very huge, in the Ninja War, the three talents in the Fire Genma can use the Flying Thunder God Technique, while the fourth generation of Naruto Wave Feng Shui Gate and the second generation of Naruto Senju only need one person to do it, so, just by kakashi's chakra, it is still a little difficult to learn the Flying Thunder God Technique.
Not only that, even if Kakashi learned the flying thunder god technique, it was not enough to support him to use this ninjutsu frequently, and although his chakra amount was not small, there was still a big gap compared to the wave wind and water gate and others, so even if Kakashi learned to fly the thunder god, he could only use this ninjutsu to escape or transfer, and it was basically impossible to apply it to actual combat like the fourth generation of Naruto.
In addition to chakra volume, there is another very important condition for learning the art of flying thunder, that is, perception ability, in the anime, whether it is the wave wind and water gate or the thousand hands between the has a very strong perception ability, after all, want to travel back and forth between different flying thunder god seals, perception ability is also very important, and Kakashi does not seem to have such a strong perception ability.
In the first Ninja War, the second generation naruto senjutsu could sense that the team chasing them was the Golden Horn and Silver Horn Troops, and in the Third Ninja War, The Wave Wind and Water Gate could also detect 20 enemies through its own perception ability, just by touching the ground with one finger, this powerful perception ability, even if Kakashi wanted to learn, he did not have this talent.
So even if Kakashi lost his writing wheel eye and had enough chakra, he wouldn't be able to learn the Flying Thunder God Technique, after all, learning the Flying Thunder God Technique would require a strong sense in addition to the powerful Chakra, but Kakashi only needed the thousands of ninjutsu he had copied, and it was enough to gain a foothold in the entire ninja world.
In your opinion, after the Ninja War, can Kakashi learn to fly Thor?