^
wasn't this project has been in some sort of development since 2014, no? Because if that's the case, then I have to think that if its opened in 2019; it'd be a project that takes 5 years. From negotiations to opening day, and that would..make some sense.
Given a company as stated by Rich, Nintendo (or any game company from Japan) likes to keep their aces close to them. Atleast here, it seems that they have Miyamoto on-board with the project heavily, and it could be good to assume that Thierry could be involved with the creation of the land, no?
It is all going to depend on whos in-charge for the development. As to be honest; I can easily see Coup be the head for this project, to work close with Shigeru on how its executed, much like how Coup worked heavily with WB and JKR to bring Potter up and running, it can easily work out well.
We also have to expect that Nintendo in circumstance, will be as protective if not more, then how JKR was with Potter and the implementation of her IP in the parks.
Although, that's just my personal opinion on how Nintendo could be handled, as they are a very, very, VERY protective company in every aspect.