I still feel that a full video game theme park on the scale of a current Disney/Universal gate will never happen. I am the biggest gaming fan that I personally know (I've been goofing around on PSVR all morning) but I still know that there is a very real negative opinion that gaming still can't quite shake off as a hobby in too many people's eyes, that will likely forever delay anyone ever taking the risk on a full park. Lots of folks still view it as a solitary and anti-social habit for pale, overweight, violence obsessed youths, which as I will repeat, is absolutely not my personal opinion.
I feel that many of the elder family members who book and pay for these vacations to Florida will just not find the idea of a full day at a video game park appealing, no matter how cool the rides and experiences would be.
Nintendo would be best served by taking following Potters example and placing an individual land/area in each park. Maybe Mario World in Universal Studios, Hyrule taking over The Lost Continent at IOA and another land (maybe Pokemon?) in the new park. This encourages Nintendo/video game fans to book a multi-day vacation and also increases non-gaming fans awareness to the brand in a natural and hopefully appealing way.