The only known resort is the one at Eagle Pines which originally was going to be built before SSR, but then was moved back and put on hold.
No definitive news on whether Eagle Pines will ever be built or not.
If built, EP would be the 2nd closest to the MK (VWL would still be closer), but still a ways away. It would be next to the Eagle Pines golf course, over near the Fort Wilderness campground.
Any chance this is the resort your source was referring to?