Green MP Julie Anne Genter expects the Kermadec sanctuary to go ahead under the incoming Government.
The bill to establish the world's largest marine reserve was put on hold last year due to legal objections that it overrode Maori treaty rights.
There have been fears the bill could be scrapped in the Labour-New Zealand First coalition agreement.
Ms Genter said more consultation is key to getting a good deal for everyone.
"You don't just go out there and bowl people over and put stuff up. That's not a good way to run a country, you can get good environmental outcomes and make sure everyone is on board."