As someone who worked in animal care at an aquarium, I can tell you that the opinions of most people have changed regarding animals in captivity. Most animals in captivity live horrible lives. I remember telling myself that the education and hopes that the younger generations will protect them in their natural habitats is worth the cost that these animals must bear. It isn't, too many zoos and aquariums are stick in a vicious cycle of death and replacement. While some animals can live decent lives and reproduce in captivity, the decisions on what animals to keep and have on display are made based on ticket sales, not science and the opinions of those in charge of animal husbandry. I think many people, including Disney guests, see animals in captivity negatively. With cameras and phones everywhere, photos of sick, injured, and dead animals can make for some very bad press. I would hope and expect that Disney will drastically reduce the number of animals that are cared for and focus only on species that are suited for life in captivity.