Okay, so we all know that Kakasi is losing his sharingan> well maybe this wont be a revelation to everyone, it is to me....
Kakashi's signature thing throughout the whole series has been the sharingan. He wont lose it forever, because rarely do we see characters change their staple completely?? Almost never, and especially not in the begining of the final series of fights for the entire damn series!
So Kakashi is going to get another sharingan, if not two sharingan! Either a) sasuke is going to die and give an eye to his former master (like obito did) or b) sasuke is going to offer itachis eyes to kakashi
both of these would require sasuke to still be a good guy at heart, but i believe his is.