The issue with Waterparks and pools are, we don’t really know what affect chlorine and water itself has on the virus. A lot seem to think that the virus cant spread through pool water and hot tubs. And most seating at pool decks on Disney property are in the sun where the temperatures mixed with the humidity likely won’t allow the virus to pass from a host. That doesn’t stop other factors of what people touch surrounding the pool area. And even though you don’t often see people coughing in others faces while in a pool, I’ve seen people sneezing in pools, and half of your body is out of the water. So who knows if it could be passed through droplets touching your skin if you’re in a pool and submerge every so often.
Pools at Disney will more than likely be open along with the resorts, but they’ll probably have limited capacity, and maybe a reservation system. Other states, including NY, which many areas are still under SAHO have Waterparks planning a mid June opening. I don’t think Disney or Universal will open theirs right out the gate, mostly because they’re already going to have enough on their plate when they reopen the other parks. But I’m not sure it’s as far out in the future of an opening as it’s assumed. I think VB will open soon after the other UO parks, and Typhoon Lagoon/Blizzard Beach might be a little later in the summer season. Just my guess. Just like everything else, no one knows for sure until they tell us