Wait!!! I just got the email - they are crazy. I don't have theme park admission, just a resort reservation for May 2021!

They must consider reservations valid them park admission.
Unfortunately, these new measures have required us to cancel any FastPass+ selections you may have made. In addition, upon reopening, Extra Magic Hours will be temporarily suspended. We recognize the inconvenience this poses and we’re deeply sorry.
However, because you have valid Theme Park admission, you will have access to the Theme Park reservation system before new tickets are sold to other Guests. There’s nothing you need to do at this time. We’ll be contacting you soon with details on this new system.