As long as they actually are interested in running them as parks and not going to sell off rides and other assets then repurpose/sell the land for housing... Kind of what I've heard is a common threat to golf courses.
Heck, if AB-INBEV created a subsidiary dedicated to non-beverage related business, they could essentially re-buy the park literally next door and use it once again as a giant beer sales tool. Though if that ever happened, chances are the budgets will be even more tightly controlled...
The best block to that is for JCC to ensure the zoning will not and can not change and it's locked into only being an amusement park.