I think it all depends on your definition of "unleash." He's steadily seen more and more snaps over the past eight or so weeks, and fairly consistently appears to look like he belongs out there based on his route running, quickness and hands.
I wouldn't be surprised if we have a few wrinkles where we could involve him more in a game plan if given a desirable matchup. And by "more" I mean maybe a grand total of three, four or five more plays where he's simply on the field. It might not mean but one or two more passes thrown his way in a given game.
But by no means do I think we're trying to hide a secret weapon from the NFL before getting to the second season. We know who this offense runs through. And besides, I don't know if it's a good idea to try to start making drastic role changes come the postseason.