I'm a video game nerd and a Nintendo fan over the years. The prospect of a Nintendo Land doesn't excite me at all unless it comes with an amazingly different video game/ride experience (which is kind of what I'm expecting out of the Millennium Falcon ride). The different Nintendo properties don't scream immersive worlds to me (they are iconic characters but not worlds).
You could make a whole park out of Nintendo and create a Magic Kindgom mirror park with HyRule castle in the middle, mario land on one side, zelda world in another, metroid on one and Pokemon on the other. That would be incredibly popular I bet, but not nearly as "immersive" as a SWGE.