I'm starting to feel fairly pessimistic about whether a fourth dry park is actually in Universal's mid to long range plans.
In the context of theme park resorts, they actually don't have that much land suitable for building, especially once roads (Kirkman and internal), future parking, and the planned massive backstage area are taken into account.
The proposed infrastructure plans leave just enough space where the parking lot is for another dry park, but that would leave no room for a water park or directly connected hotels. This isn't a huge issue - hotels can easily be done on disconnected parcels, except that if they want to have enough hotel rooms to support four dry parks they will need more land, and they have publicly shown no initiative of the sort, letting options like the large Artegon Mall site pass them by.
The seeming lack of concern for additional land acquisition makes much more sense if they intend for the remaining 80-90 acres of the new resort to just be a water park and a couple of hotels. One less dry park lowers the number of rooms needed to have a balanced resort, and getting more hotel rooms in the contiguous area means that they will likely be able to fit most of the remaining rooms needed on land they already own.
I know that insiders have spoke of 4 parks being the long term vision, but looking at universal's recent actions I'm not seeing a whole lot that supports that theory, at least on this land.