Near Epcot... Do you mean one by Epcot's main entrance? (In addition to the Swolphin Fantasia Tower.)
The one near MK... there was a rumor I remember from somewhere (and you could possibly be the source, or, I heard it on Reddit) of possibly:
1. New Bay/Contemporary Tower.
2. New resort out by the old race car track.
So, a few months ago I planned a WDW vacation for the beginning of March. My usual first choice, the Swolphin, was booked some of those days. So, I went with POP. Then, just yesterday, friends joined in and we needed another room. Went to the Disney site and found that every single Disney resort room was booked except for a few over $550/night.
So, it seems to me they need more rooms.