We're running into the WDW problem of having too many deserted/underutilized areas in the parks. There's enough at the current parks to address, and I'd rather they prioritize over a new gate.
- USF -> FFL, Springfield, F&F
- IOA -> Lost Continent, Toon Lagoon Theater
- UEU -> Additional Capacity
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However, it is fun to speculate about the next UOR gate. With their current footprint, you can add a massive Endless Summer-style hotel by the Icon Park land... roughly giving you an additional 3,000 resort rooms over there. Then, assuming a new gate is eyed for the Epic parking lot, you have a few small plots closer to Epic Universe that can fit Aventura/Stella Nova style hotels. Stella Nova, for example, has a massive parking lot that I can see converted into a garage, and then add a 2nd tower for more rooms. Kind of like how Cabana Bay added towers over time. There's also space closer to the existing parking lot toll booth that can fit a hotel by the water.
I also wouldn't mind the Epic Universe parking lot transformed into a resort paradise, like the existing north campus, with lush gardens and rivers. Add a large shopping/entertainment district that rivals Disney Springs, etc.
In a very "out there" scenario, SeaWorld becomes the 4th gate (minus animals and significant transformation of course). You can keep some elements like the Orca Stadium for a large nighttime show platform, Mako, Manta, etc. Only reason this would be considered is because SW owns a significant amount of unused land at the moment that are begging for resort hotels.
With how the SW parks are run nowadays, I wouldn't mind this at all. Of course, this area of Orlando is already congested, so a major transportation solution will be required (Just crossing the 528 along I-Drive) is a pain in the butt. Those dashed yellow lines are necessary road improvements to help people get in and out of the resort area. SeaWorld does 1/2 of the attendance of a Uni park, and the roads can't handle the traffic as is... imagine a Universal resort area.
