They have been closing off sections of the WDW resorts when occupancy was low. This cuts down on staff and operational costs. Things may have gotten so bad that it made sense to close one of the moderates, so they chose the smallest. Technically, this is a "large section" of the PO complex.
I find it hard to believe as well, but some travel agents have posted they received notification.
DVC resorts will remain open as long as the occupancy levels sustain it. I don't believe they'd ever close an entire DVC resort but they could close off sections.