I would keep an eye on the
Know Before You Go section of WDW's website for updates. Some resorts still do not have posted re-opening dates. Likewise, closed attractions don't have known plans for re-opening, except for those down for planned maintenance. Other services may or may not be returning -- no trams in the parking lots, no boats to DS yet (maybe not until POR/POFQ reopen), no luggage service (probably not returning), etc. I would expect current status-quo, and anything else that re-opens in the meantime is bonus.