I know how popular it is. And its my honest opinion that that cant pull the weight of a land. Besides popularity, creatively what material would you draw from? Would the whole thing be a chocolate factory? How much space would that take, how many attractions could be implemented using that theme without being redundant? This isnt Roller Coaster Tycoon where you pick rides and put em down, you have to weigh building costs, operating costs, etc with the return on the investment. Like this ToT glass elevator ride...is Wonka's fan base the types of people who would ride ToT?
I think that maybe on paper it sounds like a cool idea but really thinking about this in the flesh, it seems unrealistic.