Hokage Training begins around K11's age set. So most likely one of them (Naruto) will be the next Hokage unless Tsunade dies before then. If that's the case, then they will go with who they were originally going to put forth befor Tsunade came out of her coma....which is Kakashi.
Sasuke because is the one who actually knws what it takes to be a shinobi, what it means to be a hokage and what it a village which were answered by the Ones Who Know Everything, naruto just wants to be hokage off of emotion but sauske has been showed the meaning of it by the greatest kage's ever so...