So, after catching up...
Zelda would be perfect like a Springfield-type expansion. In Springfield, you never see Evergreen Terrace, so you don't have to do the whole thing to make it immersive. I think Hyrule Castle Town and Hyrule Castle would be sufficient. You could even have the moat and drawbridge leading in from Hyrule Field to set it up like a secret land a la Diagon Alley. This is all based on Ocarina of Time (which I believe is the most quintessential of the Zelda games).
Also, where does the current rumor leave Animal Actors, Spongebob Storepants and ET? They're all attractions without a land. Why not just swallow them up whole? Repurpose FFL for AA for now and then eventually swing around and raze the whole section between London and Springfield for another full land.