What About NZ's Other Flags?
Lesser known is that New Zealand has a number of other flags used for services such as the Airforce, Navy, Merchant Navy, Fire Service, and Police. these flags look slightly different to the New Zealand Ensign, and such flags can be updated easily when flag change occurs.
The Canadians simply removed the Union Jack and replaced it with their present flag, it would follow that NZ would do the same upon flag change.
HOW NZ'S OTHER FLAGS COULD BE DESIGNED
This flag takes the lead from other Commonwealth countries in removing the Union Jack and replacing it with a future NZ flag. A Kiwi could also replace the 'NZ' roundel.
A future New Zealand Navy flag could include the existing navy emblem which features an anchor, and silver ferns.