There's a point where speculation and insanity meet and I think we may have met that point.
Honestly, when you guys type out these posts, do you honestly in your heart believe Universal/Comcast are going to actually do it? I'm not even thinking of a potential 4th dry park until I walk in the gates of the park on the south plot.
If I had to put odds on it:
100% guaranteed to happen:
3rd dry park
2nd CityWalk
3-5 hotels with 4,000-5,000 rooms
They have the 1) land, 2) demand exists (i.e. USF/IoA approaching 10 million guests a year), and 3) additional IPs like Nintendo and possibly LOTR to anchor.
Next tier is around 80-90% likely to happen:
2nd water park
2-3 more hotels with another 2,000 rooms
As long as everything works in the initial rollout (as it should) and there's no weakening in demand at Volcano Bay, this phase will happen.
The speculative tier: odds between 0% and 50% of happening over next 20-25 years:
4th dry park
3-5 hotels with 4,000-6,000 rooms
This depends entirely on how successful the then-current resort is... if USF/IoA attendance starts falling, it won't happen.
Also the land may not exist for this phase until Lockheed decides to move from its 300 acre plot nearby, so land may be an issue
unless they plan for it ahead of time.
But IF USF/IoA/3rd park are all at 10 million + attendance with no declines, and IF the hotels are all running at 90% capacity, and if the land needed (120 acres for the park and 100+ acres for the hotels) exists, then this phase probably will happen.