Shame the plan never went through. I'm wondering if it's because they weren't able to obtain a male whale. From a business standpoint, there's no sense in making a new whale tank for a single animal that could easily be dead in a year (by captive orca standards, she's very old) if they aren't going to get more whales. (even if they wanted to get more whales, they aren't easy to obtain) The only hope of her getting a new tank at this point (without bringing in more whales) would be if, like you suggest, they plan on using it for another species after she bites the dust.