Part 1 Sasuke and Naruto are not going to beat Kakashi. Although I would like to see that fight. Curse mark and Nine-tails power....I wish I could see Kakashi's shocked face.
Kakashi, Naruto and Sasuke may have power but at that time they didn't have battle experience, they would make stupid mistakes that Kakashi with his experience would exploit
I understand what yall sayin but valley of the end naruto & sasuke was the 1st true sign they both would become the op beast they are now experience is supplementary as shown op wins 99% of the time ask diedara & danzo or kakazu & jiraiya
Kakashi would have to use half his chakra to make a clone then he'd be screwed he can't survive facing them together