The appeal will cover "whether the Court of Appeal was correct to uphold the striking out of Mr Hotchin's third party claims against the respondents."
Gedye argued the facts concerning the Hanover directors and the trustees are "intertwined" and should appear together at the trial because of the information flows between the two, which he said had been accepted by the FMA.
The trustees and directors are linked by the harm caused to Hanover investors, regardless of the different actions on each side that may have led to the harm, he said.
"It offends justice that the trustees are not required to contribute," Gedye said, calling the previous decision a "repugnance of justice".
The FMA is pursuing the former Hanover directors and promoters in a civil suit over the period between December 2007 and July 2008 when $35 million was deposited with the failed lender.
In April, the Serious Fraud Office closed its investigation into Hanover after deciding not to seek a prosecution, though it will provide information and evidence to assist the FMA's claim.
Hanover Finance froze $554 million of funds for its 17,000 investors in July 2008 after running into financial difficulties, before convincing them to accept a disastrous deal where their debt was swapped for equity in Allied Farmers the following year.
The appeal continues in the Supreme Court.