I don't think that's correct though.They had ZERO clue it would be this popular. Just as they had ZERO clue a Harry Potter land would create lines out the front gate. To assume anyone KNOWS how much traction something will garner is what's INSANE here.
You need proof? Look at the original plans for this land. It had everything: Mario, Luigi, Kirby, Donkey Kong, Zelda, Pokemon. Oops, now HALF of that lineup is missing! Clearly when this idea was being fleshed out they had never once thought about putting Nintendo into multiple parks. Which is pretty much the definition of them NOT KNOWING HOW POPULAR THIS ANNOUNCEMENT WOULD BE.
Honestly...
They do have the hindsight of Harry Potter this time around. That's what's different for Nintendo and theoretically LOTR down the line.
The notion that they were going to put everything into a single park in Orlando was just speculation based off the initial plans for USJ, but that never made sense based on the hindsight of the power of a multi-park IP like Harry Potter.
And we do know the power of various IPs, it's pretty clear to everyone that there's a handful of "attendance increasing" or "IPs that can shift the needle" to various degrees in the post-Harry Potter world. Star Wars fits that category; Nintendo and LOTR do as well. Star Trek to a lesser extent also fits that. Whether an IP can shift the needle depends on a lot of factors, but I don't think Nintendo's ability to increase attendance was ever in doubt.
I'd be skeptical of any reporting that said it was going to all be in one park; after Harry Potter, that would be complete malpractice.