From Wikipedia:
"When voting age New Zealanders were asked in July 2017 if they supported "Growing and/or using cannabis for medical reasons if you have a terminal illness", 59% responded that it should be legal, 22% supported decriminalisation, while 15% responded it should be illegal. However when they were asked their thoughts on "Possessing a small amount of cannabis for personal use", 37% responded that it should be decriminalised, 31% responded that it should be illegal, and 28% responded that it should be fully legal."
Seems from this picture that only a small group thinks cannabis should be illegal. If most of the decriminalizers (37%) vote in support of the bill, along with the legalizers (28%), then it may well pass. Let's hope for that outcome!