i'm pretty sure that "stage 2" of the australian bush is exactly what you see there today. personally, i don't think investing in more native animal exhibits is a good strategy for melbourne. unlike taronga, adelaide or perth zoos victoria have the sanctuary, a third zoo focused entirely on natives. thus i feel the melbourne zoo should limit the amount of natives it keeps to encourage people, particularly international tourists, to visit the other institution. i think keeping it nothing more than a "showcase" is a good idea and any future expansions should be focused in the new guinea realm, creating something "australasian" but not quite "australian".