Another option is to walk to the Contemporary and take a bus direct to Epcot. I think they have a bus to EC.
I don't think so. They would just hop on the resort monorail line and go to the TTC and then take the Epcot line.
Not sure how much time you have inbetween the two ADRs...If it's less than an hour, it may not be doable. You have a few options....monorail to TTC, change to the Epcot line and then walk to LeCellier...best case scenario for time would be about an hour...maybe a wee bit less.
Or you can take a bus to BW/S/D or YC/BC and then walk over to World Showcase via the International Gateway..could be about the same timing.
Here's how the times might breakdown..
walk to monorail platform at MK...3-5 mins
wait time for monorail to come...between 0-15 mins
ride to TTC..about 10 mins
possible wait for Epcot monorail...0-15 mins
ride to Epcot....10 or so mins
walk to LeCellier..about 15+ mins, depending on pace and crowds
Or....
walk to buses...5 mins
wait for bus...0-15 mins
ride to resort...15 mins
walk over to International Gateway...8-15 mins, depending on which resort
walk to LeCellier...10 mins from Intl Gateway
And of course, when you're in a hurry, that's when all that stuff happens to slow you down. At least that's what happens to me.