Drummond has about the same chance of winning MIP as Steph. Both are already beasts, and they're just more beastly this year. In my opinion (I don't know if you guys agree with me on this), MIP should go to players who were relatively unknown and became extremely productive players/"starters", or role players who became franchise players.
That said, I think CJ McCollum is this years front runner for MIP, since he fits the first. Crowder has been good this year too but I think he still needs to do more (particularly on offense) to win it. After all, he's already established himself as a tough defender last year so it's not like his defense has drastically improved to MIP status.