It is not a ridiculous idea, unlike what you think. I am not a fan of real animals going away from Disney's Animal Kingdom, but there really is a possibility due to what has been happening in the region I live in.
My local zoo is facing the possibility of not having elephants anymore. The local zoo has elephants, but they are forced to get a couple more or the animals rights people get their way aka have no elephants at the zoo. The animal rights group did this despite a recent big expansion for the elephant area of the zoo.
Before you say my local zoo is an exception, it is not. There are zoos in the region I live in was forced to get a rid of their elephants due to the animal rights groups. The region in question is the Midwest. Since the animals rights groups are doing this to Elephants in zoos, who says they are not going to do the same towards other animals in zoos.
I am not going to be surprised if the Animal rights groups are going to target animal Kingdom at some point as a result for forcing Disney to get a rid of their elephants.