I'm not a fan of captive Orcas, personally, but that's primarily due to having read the book by one of the guys who was instrumental in capturing the first live orcas for public display - and what was done to capture those whales. A vast number died before they got a live one, and more died before they figured out how to transport them safely. Pods were slaughtered to try and get one live whale. However, the results of that atrocity was a drastic shift in public perception. Before that, there was a huge amount of bias against orcas - and people took the term 'Killer Whale' literally. Seeing them in captivity changed public perception on a massive scale, from considering them unimportant and harmful vermin to magnificent, intelligent creatures. I am not at all sure that a captive breed and release program would ever work with creatures such as Orcas.