Seriously doubt they would be so amazingly careful with Drummond all pre-season and then suddenly rush him into the team for round 1.
I agree it is not likely, but I wouldn't be totally shocked to see Drummond in the team. Particularly with McKeever being very rusty at this stage, and an extra week in between Drummond's game in the reserves and round 1.
Must be a little bit tempting. I am almost resigned now to Drummond being constantly injured, so if he is ready to play reserves, you almost might as well play him in the seniors (as long as there is not someone in front of him that has clearly earned the right more, which isn't really the case).