Since downunderland seems to be becoming an epicenter of dancepop right now, I say bring em all over on one plane.
Cut Copy should come back anyway. Maybe play an outdoor night set.
Empire of the Sun
(obvs) The Presets
And bring the Juggernauts back to play at night this time.
Im sure there's more I'm forgetting.
Shit, it would be a great excuse to bring Kylie in too.