I don't know what Disney will or won't do, but I would suspect that the idea of delaying reopening warrants consideration. With the numbers rising in Florida, from a public perspective aspect, it kinda looks bad to reopen under the current circumstances. Right or wrong, there will be folks that will opine that Disney has placed profit over health.
We know Disney cares deeply about how it's viewed--and although the numbers rising are no fault of their own, they'd be foolish IMO to play ostrich and put their head in the sand. And we all know someone will visit Disney and contract the virus and there will be an article somewhere about how the person socially distanced, wore a mask, washed hands, took every precaution, etc. and Disney will be criticized for pushing forward when the numbers appeared so dire.