While not myself an Australian, I nonetheless grieve for their loss.
Further on the point: We Americans don't need an American Mad Max . It's called Borderlands . Actually, no: It's called FALLOUT ! It's been there for ~20 years, even further back if you count it's older spirit brother Wasteland . We're fucking over-saturated in desolated, dusty, apocalyptic wastelands!
Seriously, even if they decided to be all vague about the location, the very last thing to do would be to flat-out state that it's NOT in Australia.
Eh, but then again, I wasn't planning on getting hyped over this thing anyways.