Well we cant be sure about what will happen yet, we just have to wait for the manga to be released. Although in my point of view i dont really think kakashi will get the rinnegan cuz i dont really see the point him achieving it.
Naruto D. Luffy wrote:
Kakashi sharingan is just a nuisance to him if he gets his other eye back so it really doesn't matter
Sorry, what? Kakashi's two major techniques, Kamui and Raikiri, are usable to him because of the MS. Kamui because, well, it is an eye technique. Raikiri would make him go tunnel vision without it, making the move far to risky to use in combat. And his other eye is gone.
well kakashi is a non uchiha so his sharingan is a "borrowed" power to him, its true kamui is one of kakashis best techniques but with his sharingan (obito's) or not he can rely on his other techniques