The Miami-Dade County could certainly use a theme park. The nearest theme park is about 200 miles away. Miami is a great tourist city with the restaurants, beaches, and culture..so an investment in an amusement park to compete with the Orlando and Tampa parks wouldn't hurt.
Also, I know that the San Francisco Bay Area already has 2 parks in the area (Great America & Discovery Kingdom), but we could honestly use some sort of revamp on both. The Bay Area is heavily populated with both residents and tourists..why are the parks so small? My home park of Six Flags New England was far more impressive in terms of size.