Someone can be good enough to start but stuck behind someone better and take a jump to another power school. Or, someone can turn out not to be as good as hyped and wind up transferring down (i.e. Andrew Ford). Or someone could mess up and wind up leaving the program and winding up somewhere else (i.e. Lawson).

So with all those possibilities, and 4 guys in the mix, yeah, something will probably happen. Predicting it is impossible, so just enjoy the ride.