Even phase 1 in KidZone has an area set aside for future expansion. Not only are they going into this with everything they've got, it appears Universal is already preparing for the possibility of growing the Mushroom Kingdom. They're already looking at this as Potter level, and it ain't even built yet.
But, as they did with Diagon, I'm sure this will be a wait and see situation. But if it takes off like they expect, we can expect to see movement on more Nintendo quite quickly after the first area opens I suspect.
I don't disagree with any of that. I kinda think ET may some day end up being the Zelda plot. Or if they do build another Nintendo land at the South property, have Zelda be a part of it.
People said the same for Avatar and yet...
Zelda isn't the biggest box office movie of all time though.