Theres no need to invent origin elsewhere in the world when we have these international teams.
If the same amount of work is put in to internationals as this NZ origin would require they would be successful long term.
Build the international sport don’t undermine it further.
In an ideal world NZ would be able to hold such a game before its test season and it would be a profitable exercises for them on and off the field and international bodies would hold serious sway and cash so clubs would suck it up. It would impact the club calendar rather than the test calendar.
But you're right, as things stands it could only be held in a standalone week and any such weeks should be used for international test football.
A more realistic alternative idea:
During the finals in September, there are only a handful of NRL teams in play.
So there are spare days on the calendar and a lot of spare players.
Australia runs the PM XIII program in PNG and this year Fiji.
Why doesn't the NZRL try something similar as a lead-in to its post season rep program.
They could play a possibles v probables game in NZ,
They could use an NZ-A or Maori side to visit Cook Islands, Samoa, Tonga.
Or some combination of these ideas.
The NRL clubs wouldn't kick up much fuss, it doesn't clash with real internationals, it keeps their players firing and fighting for positions before the test season.
NZRL needs to think outside the box to get some cash in its pocket and the fans onside.