But from the data I've been tracking, virtually every country is following the same sort of curve, albeit some countries are further along the curve than others, once you normalise the data for population size (something that most media outlets don't do). So we can expect the curve in Florida to follow the same sort of curve as elsewhere, and my statistical analysis shows that Florida is roughly where Italy was on 10th March. So I would put Florida around 3 weeks behind Italy, and given that Italy is peaking just about now, I expect the peak for Florida to come around 3 weeks from now. That would make the Florida peak late April, not mid-May. Then if we assume another 3-4 weeks of numbers dropping after that, I can see the parks opening up late May/early June. Which is why I can see that Disney seem to be aiming for a 1st June opening. If I was a betting man, that is the date I would aim for too.
Of course, the big question then is will people be allowed to enter Florida? The US seems to be well behind Europe, so I would expect our restrictions to be eased before the US, so I am confident that, as a Brit, we might be allowed into the US, as our numbers are likely to have dropped by then. But will US citizens be allowed into the UK at that point, as numbers of cases will likely be higher in the US than UK by then? In which case, transatlantic flights might not be fully working by that point.
So I can see travel restrictions being the limiting factor on the decision for Disney to re-open, and infection rates outside of Florida, rather than the infection rates in Florida itself, will dictate that.