If it actually took something from Disney that was something Disney owned then it would be Socialism. However, Disney didn't own the board of that district (not a town, and yes, you did call it Disney's town in your OP). Taking over a special district is not socialism as the Governor did not take something that belonged to Disney. Had DeSantis simply taken over Disney and removed any private ownership of the company you'd have some point.
This doesn't even fit Fascism as it isn't a Cartel and doesn't run the entire industry, it is a government entity taking over the things that government is expected to run... Shocking as it is, this doesn't fit the definition of "Socialism" by any measure. Nothing that Disney owned was taken from Disney.
I suspect that the OP is referring to the comments DeSantis made about controlling the content of what Disney puts out, not the actual land itself that it sits on. It almost sounds like blackmail to me. "You will produce/not produce content that we approve of, or else."
If this happens, clearly it violates the First Amendment, among other things. DeSantis is an idiot. Disney is a huge cash cow for the state, bringing in billions in tourism dollars. Because of the tax revenue from Disney*, FL residents are able to escape having to pay state income taxes. How pleased would the citizens be if DeSantis kills their cash cow and they have to start paying taxes?
*$5.8 billion