In 2008, the Royal Commission of Auckland Governance received a number of submissions opposing Waiheke being part of the proposed Auckland Council.
But the application has since been renewed, along with Rodney's.
Bill Townson of the Northern Action Group, which represents Rodney residents who are campaigning to break away, told Fairfax he was not optimistic of the group's chances.
"We've become cash cows for Auckland."
His group planned court action if the bid failed and would push for a referendum on the issue if its bid was knocked back.
If successful, the break away would see Auckland Council lose a quarter of its territory to a new North Rodney Unitary authority and Waiheke's bid would create the country's smallest territorial authority by population, Fairfax reported.