I can appreciate the Elephant enclosure. It is a very modern looking building, which could almost look out of place in a zoo, but I think as has been mentioned, with the vegetation growing around it might end up looking good. It might actually blend in so well with the vegetation that it might even be inconspicious. Of course this is if they plant trees and shrubs around it.
The usual suspects for something like could include a simple steel construction (which would have looked worse), something similar to the old Elephant house (which would have looked more out of place) or a Thai inspired building (which has been done).
I find Fed Square to be very interesting too.
Also, those windows may not have glass. They could just be for ventilation.