I've read a lot of great points about fears of being in a crowd even if it reopens and also points that WDW may opt to reopen from a business perspective. There is a lot of truth to this - it all depends on what Disney as a company feels they need to do in conjunction with public sentiment about the virus. I know someone who's tested positive and they were told 7-10 days from their diagnosis and 3 days without a fever they are "clear to rejoin society". So in a few weeks there will be corona positive people that are being told they can go back out in the world. So what will the world be doing in 30 days? Even if Disney reopens in May (I'm an early/mid May trip) there may be cancellations and limitations that may not live up to my expectations to the value of the price being paid. If the numbers are still spiking May 1st and the Government isn't encouraging businesses to open up there is a chance WDW and other tourist attractions may continue to shutter.
Others have mentioned state restrictions and I think this will be one of the biggest factors. I'm from the NYC area, so no one wants us right now and Florida is really clamping down on that from articles I've read. When that laxes and numbers being reported begin to improve I think more and more tourism revenue dependent companies may open with limitations, waivers, strong cautionary messaging just to create some kind of cash flow. I think that kind of opening (WDW or otherwise) you'll see cuts in places because if they are making limited income - the experience will be limited too.
American Director of the National Institute of Allergy and Infectious Diseases Dr. Fauci currently believes in the USA we'll be seeing the apex by April 30th. So if that projection becomes reality, more positive press may release, businesses encouraged to open up (whether they should or shouldn't I'm not covering here) and we'll see WDW likely reopen.
I read that WDW is not taking reservations until June 1st which implies they expect to be open by then. It does not necessarily mean however they won't be open in May - in fact that may be a way they will try to implement a crowd control strategy as the world will be on edge. This way there's no new visitors outside of those that have already booked May in advance allowing the parks to test the waters and make people feel safer.
As a consumer, I want the park to reopen in full with at least an illusion there's nothing being taken away. The park will feel that way at some point again - unclear if that will be in May That's my biggest concern, is "If it's open, how much is my trip being devalued?" As someone who's already been exposed to the virus and on the younger side with no children, it's easy for me right now to keep my vacation until I know what is being devalued if the parks are open.
So to tie that all back up to a follow up to my earlier response to this thread. and the original post, if you have health concerns or are still nervous health wise, see how you feel in 30-45 days about the pandemic and cancel if need be. If you don't, hang on to it.