I'm think it will be MSN5, F-WWYB which is built to the same production standards as future aircraft and will be used by Airbus for route proving. It is also fitted with a cabin and I believe it was originally planned to be painted like F-WWCF in the full carbon fibre livery.
(Picture from Airbus's gallery)
This article states the aircraft will arrive on the 4th (Monday) and fly to AKL on the afternoon of the 5th (Tuesday)
http://australianaviation.com.au/201...ur-down-under/