No one said anything about tearing down the animal hospital, actually think that could fit into the zootopia theme, I also wouldn't make the argument that AK has a strict theme. Pandora was a weird flex, i like it, but can't say it truly fit AK original idea.
I'd like to see a possible expansion on Pandora, Navi river journey is a waste of space imho, FOP is such an incredible attraction need to see more along that lines.
The other idea for the land could be a Wall-e! I think the ideas of conservation fits into the idea of AK. Would need to find a way to bring it to reflect the impact of pollution on animals and humans.