I can have a very easy time believing that his resistance to this project (if the rumor is true) is what got him "fired." It's a real shame if that's what happened. Kick the one guy who actually cares to the curb...
Sequestering it away up in the Rafiki's Planet Watch area would be the least offensive-to-theme place for it to go, certainly, as no other lands would directly flow into or out of it.
But on that subject, did this new Zootopia rumor specify that it would be taking over Dinoland? Because that would be adding insult to injury. Dinosaurs need to remain represented in the park in a significant way, in my view.