You are cutting it WAY too close. Assuming everything lands on time...you won't even be dropped off to your resort until about an hour (or more) if using ME.
Then, you must still check-in (can be a long process) and get your ID cards, your luggage, travel, etc. Even if you want to go eat before going to your room, you'll still have to travel to the restaurant and walk through Epcot.
Typically I'd leave my hotel about 2 hours before my ADR (maybe a bit less) but 2 hours after you land??? WAY too close IMHO.
I'd bet you're going to be at LEAST an hour late...and that's if you RUN through every process stated above. Do you really want to start your vacation on the run?
I would cancel and re-book. No offense, but making an ADR and planning on being an hour late is just taking a viable ADR from someone else.
Hope you enjoy your trip!