It usually takes young prospects two to three years before breaking through. Some show flashes but do not produce a steady stream of results early in their careers.
Each of the following players are at a different stage of his development. Whether entering phase two or phase five of the developmental process, now is the time for that player to make the leap.
I wouldn't call this a make-or-break season for these players, but for the sake of their teams and for them individually, these guys must take the next step as NBA players.