I did mine as a look into the future of Disney's special legislative status as an independent Improvement District. It is the only corporation within the state to have all of the powers of a county except taxation -- there's also been some fuss in the state lege the past few sessions about the implications of this status, mostly kicked up during the Comcast takeover bid. Regardless, the special status (and the status of Improvement/Drainage Districts in general) granted to them is interesting, especially looking into how it came to be. I'd suggest getting ahold of Dr. Richard Foglesong at Rollins College if you're interested in this -- he wrote Married to the Mouse and is a well-respected authority in the field concerning Disney and Central FL in general.
Other things you might want to look at are environmental policies in the area -- Orlando is home to Shingle Creek, headwaters of the Everglades, and Disney has a lot of influence on local policy, environmental and otherwise. How have they influenced state and federal environmental policy? What do their educational programs do, in a larger sense than handing out buttons at DAK? A great source for this would be Dr. Keith Gaddie at Oklahoma; he's written a few books on environmental policy, specifically wetlands protection and regulation, and would probably be able to give you a few good ideas on things you might want to look into.
Maybe something on New Urbanism, local governments, the issues presented when starting a new town, and specifically discussing Celebration; what happens when a town is essentially sponsored by a corporation? How was Celebration an outgrowth of the original plan for Epcot? What happened? What have the effects been on Celebration since Disney ceded control of the town?
There are always the economic effects Disney has on the surrounding counties -- before Disney, Orlando was shaping up to be a technologically-based economy (due largely to the expanding Space program, the relocation of Martin-Marietta and other tech/aero/defense firms to the area). What has becoming a primarily service-sector based economy done to wages in the area? (Hint: it's definitely not raise them!) What has tourism's effect been on cost of living, property taxes, and/or commercial real estate? What has local government done to maximize positive effects while eliminating negative ones? What programs have been put in place, successfully or otherwise?
The development of the local infrastructure -- how have the highway system and other planning issues coped with the influx of Disney, Universal and Sea World, as well as the burgeoning population in the area? How did Orlando cope with it's initial population boom 35-ish years ago? What plans have been in place? Where is population growing now, and where has it grown in the past? How are schools, libraries, and other public facilites keeping up with the growth?
There's so much to dig into there -- what specific subfields of poli sci are you interested in?