After the injury plagued season he had, I would hope the Leafs leave him with his junior team for another season before they seriously consider an NHL roll for him. That said, if he performs well in camp, there is no reason that the Leafs should not give him a little taste of NHL play to make him hungry
Even if he makes everyone's eyes pop during training camp, he needs to have a full year in junior next year to dominate at that level. After that, some time in the AHL to grow accustomed to the pro game and then give him a shot at a roster spot in 2014-2015.
We could have a gem on our hands here... but let's take it slow.