Unfortunately, after some research, I found that due to some contracts and agreements regarding the licensing of characters, The Walt Disney Company cannot use certain Marvel characters east of the Mississippi River.

The absence of a "Marvel Land" or an "Avengers Campus" at Walt Disney World is due to a complex, legacy legal agreement between Marvel and Universal Parks & Resorts. Signed in 1994—long before Disney acquired Marvel—this contract grants Universal the "exclusive" theme park rights to use major Marvel characters (including the Avengers, X-Men, and Fantastic Four) in all theme parks "East of the Mississippi River." Because Walt Disney World is in Florida, they are legally barred from using these specific characters or the "Marvel" brand name in their parks. This is why the Marvel presence at Disney World is limited to Guardians of the Galaxy: Cosmic Rewind at EPCOT; Universal did not have the rights to the Guardians at the time of the original contract. Conversely, because the contract only applies to the East, Disney was able to build an Avengers Campus at Disneyland in California. For your city data project regarding Orlando tourism, this legal quirk is the reason why two rival theme parks both feature Marvel intellectual property within 15 miles of each other, often confusing many first-time visitors.