Theoretically, a Wizarding New York could fit in right near the existing NY shopfronts, take over the space of Cartooniversal and Waterworld.
If you really want to go hogwild, imagine building a new theater on the surface lot in front of the globe (or alternately near the opening next to Johnny Rockets), and bulldozing the original theater. Replace with smaller shops on Citywalk side, show building for main ride on the park side.