I get your point though Marineland would do batter as a Seaworld since it's already a marine life park. but From what I hear Marineland won't be going away anytime soon.
I can see at least one more Busch Gardens but what I was proposing was not an all in year one sort of thing. They already would have the water park the sesame place would be an easy build-up at a much lower cost. A second bigger park would be further down the line.