I would argue it could fit. The theme at the heart of Animal Kingdom is Man vs. Nature, and Nature always triumphs. Indy vs Snakes, Indy vs Rats, Indy vs Ants... you get the idea. Sure it’s a little bit far-fetched, but so is Avatar.An Indy land is not a thematic fit for AK.
Regardless, I haven’t heard much as of late on this project. (Or much of it going into Hollywood Studios either) I’ll post more if I hear more.