I agree with @DisneyJoe in that I count on 60 - 90 minutes from MCO to resort. Then there is 15 minutes to drop off your carry-ons (if you have any and don't want to carry them to the park). Then 20 - 30 minutes to get from POP to Epcot. Total, that would get you to Epcot around 7:15 - 7:30...