A380 trained crew are only based in Sydney and Melbourne (and London) so no matter where it diverts be it NOU, AKL or like last month even to BNE - a crew will have to be flown out to get the aircraft and the passengers home.
The A380 diverted to NAN last month but was able to get away to BNE (with barely a minute left on crew limitations). While the flight was on it's way to BNE a new crew from SYD was flown up to bring it down.