You could probably do it if you skipped ME - one trip I had a rental car and just a carry on and was at MGM about 45 minutes after the plane touched down. But ME will ONLY take you to the resort, and from there you need to get to DTD - which could take another 30 minutes even if you skipped checking in (I've had the worst luck with DTD buses). You cannot skip, with ME, landing, debarking, the ME line, waiting for the ME bus, the trip from the airport to the resort, the trip from the resort to DTD. You could take a cab for the last step, that would keep that time controllable - but the rest of that you are at the mercy of the airlines and ME.....