Where would you put it at Epcot- that's easy! You'd put the entrance in on that empty pad between China and Germany (where the little Africa kiosks are) and have the hotel behind it, themed to and directly attached to whatever the new country is, in line with the way GC attaches to DCA! If you look at the satellite view of the site, there is definitely room so long as it had either vertical or remote parking for the guests.
New country pavilion to make the repeat park customers happy, plus a new billion dollar Disney profit attached to it via a
dvc that would sell fast. Less need to have restaurants dedicated inside the dvc hotel, since it would be attached to the world showcase. And more likelihood members staying here would always get theme park tickets so they could use the world showcase.
Oh, if only...