It is a purchase that makes a lot of sense. It goes without saying that this is prime potential real estate for a majorly successful park if there was a company in position to eat the massive upfront costs of building a desirable one. It would be a strange time economically in the world to do so, but ignoring that, if someone were to do so, the reasons SeaWorld makes a ton of sense are swimming around in the open. They wouldn't even have to try to salvage the even more awful than their own reputaiton of this place as a home for animals, either. As questionable as SeaWorld's own habits and faciliies continue to be, there are levels to being bad at something. If they shipped the wildlife off to their own parks, it would be an upgrade for the wildlife. Then this is a wide open canvas for Busch Gardens Niagara Falls.
Hell, I think the acreage of MarineLand is close to 3x Busch Gardens Williamsburg. Over time, if successful, this plot of land is literally big enough to be an Aquatica, a Sesame Place, and a full size Busch Gardens. Obviously that is dreaming EXTREMELY big, but they are within eyesight of Niagara Falls. A top ten most visited spot on the entire globe. The potential here is legitimately off the charts. It would just be so expensive to get started at any real scale. But they could just start with a Sesame Place and see how it does, or anything like that.