There has been major disruptions to Viking Orion in Auckland with passengers coming from the US being turned around mid flight. Some made it through as they'd arrived before the cyclone. Some are not able to get to NZ at all, others are flying into Wellington but losing a lot of ports so they are cancelling. It's a major topic on Viking F pages. Viking are telling people simply to claim on Insurance as flights are out of their control. I'd say the ship will sail only half full. It's been a wicked season for Orion in NZ, they did the cruise to nowhere in January because of the hull issue.
An awful year all around for NZ. The flood damage looks dreadful. Still, much of the lower lakes in SA are still flooded due to rains coming down the River Murray. Not a cruise destination though.