And in light of Avatar Land, I wouldn't say that Disney would build a simple overlay of a single attraction if they had Marvel, but have at it.
Hogsmeade is ultimately a single, small street. Beautiful, absolutely, especially if you're a fan of the movies, but the scale of that land hardly impresses the way the films did, and the way Avatar Land should, in terms of size and scope. The Wizarding World land itself feels compact and claustrophobic, but it's understandable considering the space they had for it; they simply couldn't replicate the expansive feel of Hogwarts and the surrounding countryside. They couldn't even effectively hide the show building without risking throwing off the artistic integrity of the castle.