I don't see any way in which Colangelo will trade him this summer. Just don't think he's ready to admit Bargs can't be a #1 (or even a good #2) guy.
Throw in all the CBA uncertainty (and the MLSE uncertainty) and I won't expect any big moves from the Raptors this off-season.
I suspect the Raptors will look much the same next year, outside of whomever they take in the lottery. Davis, Amir Johnson, Bargnani will be the top three bigs, so all will likely play close to 30 minutes a night (assuming they can all avoid foul problems enough to do so) regardless of their effectiveness. There's not much you can do with Bargnani really. If he's not scoring he is completely useless, and in order to score he has the ball WAY too much.