Did a quick look at the Property Records for the area and at fast glance it is very interesting. It appears "Disney" did purchase much of the property back in the 70's and 80's (no land grabbing) mostly using Reedy Creek Improvement District. Many of the parcels still held by Reedy Creek are for things like antennas, water treatment, electric substation.
Then around 2008 land began to be sold to Disney who turned around and sold it to Flamingo Crossing LLC which is a subsidiary of Disney. Flamingo Crossing LLC then began to sell the land to other companies.
JI-FX Hotel Real Estate Developer bought 12 acres which is the two hotels currently being built. In 2011 they sold land to Walgreens. In 2013 they sold land to Hess Corp who in turn sold the land to Hess Retail Stores. There are plenty of parcels left so if this is a pattern they will be selling to future developers. Even sold they all will be within the Reedy Creek Improvement District so would need "Disney's" approval for eveything.
FYI to
@soniam