I sort of think that the fact that they want to charge a premium is an argument to keep Wet N Wild open, actually. If I'm a company, I want to have as many brands as possible to attract the largest client base I can. If Volcano Bay is going to be as inaccessible to non-resort guests as people have been implying, then there's going to be a sort of turn-off factor to those who are looking for an easy day at a waterpark. If you close Wet N Wild, that whole clientele base isn'f just going to automatically convert to Volcano Bay customers, who will be primarily those who are looking for the "premium" product at the premium price you're talking about. Basically, they kill Wet N Wild and they lose a large chunk of customers that's an entirely different demographic. I'm sure there's a chance for some cannibalization but that's also the case with the JW Marriott and Sprinhill Suites and yet Marriott keeps maintaining both.
Not to mention that there's been an aggressive push to bring Wet N Wild up to Universal standards that has yet to slow down, something I don't think would exist if it was going to close within a couple of years.