Don't think so.
What is the sale going to be for? There is bugger all international Pax flights at the moment on AirNZ. A lot of the flights are cargo only.
Also need a MIQ booking currently at the moment.
When there is a date for the Cooks & Aussie. Suspect the will be a sale then. May be a week after the flights start as they might as well get the people who want to travel the first week to pay full price.