500 acres is a lot of land. It doesn't look that big on the graphic that was shared in the Bedford Independent article, but it is HUGE.
For perspective, with some clever planning, you could fit Universal Studios Florida, Universal Islands of Adventure, City Walk, a few hotels, as well as infrastructure (e.g. parking, junctions, rail station, etc.) on that land.
The land they've bought is bigger than every other property they own bar Orlando and Beijing, and there is theoretically expansion space to the South and West.
I'm keeping my expectations in check though. If this goes ahead, and it's a big if, I'm expecting one park, two hotels, and a small City Walk. Basically whatever Beijing opened with but with a few different rides and IPs.