The 72-year-old retiree is one of six former public servants awaiting judgment in their fight for Commonwealth superannuation funds to which they say they're entitled.

Those six cases were heard in the ACT Supreme Court in 2009 and 2010, with Justice Richard Refshauge reserving judgment.

More than two years later they're still waiting, but Mr Guy might not be able to wait much longer.

He has been diagnosed with stage four prostate cancer, and a recent blood test suggested the treatment regime was no longer effective.

Mr Guy has now been referred on to a medical-oncologist to consider further treatment options.

But an affidavit in court says his prognosis is "likely to be measured in months, rather than many years".

A treating oncologist, in a letter to Mr Guy's lawyers, wrote she would support "any action that would speed up the legal proceedings which he has lodged".

Mr Guy told The Canberra Times he thought the eventual decision would answer a lot of questions for other former public servants in a similar situation.

"I know there's a lot of people just sitting on the fence out there," he said.

"I think it could open up a lot of cases for a lot of people, and I think there's'a lot of people just sitting on the fence just waiting for us."

Mr Guy's legal team, from Snedden Hall and Gallop, last week had the matter re-listed before Justice Refshauge, who promised to prioritise the case.

The judge said he would try to deliver a judgment in September.

"All I can do is look in the whites of your eyes, and you look in the whites of my eyes, and say that's what I intend to do," Justice Refshauge told Mr Guy's barrister.

The case highlights the problems still plaguing the Supreme Court, where judges and lawyers have been struggling to deal with an overwhelming case backlog.

The territory's legal fraternity is in the midst of a blitz on the court's list – significant over-listing and additional resourcing in the hopes of cutting through the backlog.

Meanwhile parties are still waiting years for judges to hand down reserved decisions after hearings conducted months – or years – earlier.

Mr Guy sued the Commonwealth of Australia for negligently excluding him from their superannuation scheme for more than a decade.

The Queanbeyan man worked for the Department of Administrative Services for about 16 years but was initially told he couldn't join the scheme as a temporary worker.

But more than a decade later, in 1996, he was told he was in fact eligible.

As Mr Guy waits for the looming decision, he's begun a new type of treatment after his previous therapy failed.

The litigant is due for a blood test in September, when he hopes to find out how the latest round is progressing.

"I don't know if I'm going to die yet, I hope not, but it's possible," he added.