Mr Bain (39) has been confirmed as a speaker at the inaugural International Justice Conference, scheduled to be held in Perth next March.
The former Dunedin man, who was convicted in 1995 of murdering his family and spent 13 years in jail before being acquitted in a 2009 retrial, will join high-profile victims of gross injustices, lawyers and forensics experts at the conference.
Others on the bill include Australian Lindy Chamberlain-Creighton, whose conviction for killing her daughter was overturned, American boxer Rubin "Hurricane" Carter, who was wrongly jailed for a triple homicide, and Gerry Conlon, who was wrongly convicted for the Guildford bombings.
Long-term Bain supporter Joe Karam told the Otago Daily Times yesterday the conference was a great opportunity for Mr Bain to "be with people who have experienced the same thing".
Mr Carter was the subject of the film Hurricane, Mrs Chamberlain-Creighton was featured in Evil Angels and Mr Conlon's story was brought to the screen in In the Name of the Father.
Asked if a film about Mr Bain could be expected, Mr Karam replied: "I imagine a movie will come out in due course."
"I'm not involved in any planning for a movie, but I am just saying there are interested parties. I think the funding and all sorts of things take a long time, but I am sure there will be a movie about the case."
Mr Bain was enjoying working at an engineering firm specialising in marine engineering and fabrication, and "he is developing well and enjoying it a lot".
He was also active in a hunt club in Auckland, and spent time looking after other people's horses in the city.
Mr Bain had returned south to Otago twice in the past six months, including at Christmas and Easter, visiting Dunedin and Queenstown.
His trip to Perth was not necessarily a signal Mr Bain would enter the professional speaking circuit, but "one thing can lead to another".
"David is quite happy doing what he is doing, keeping a low profile and enjoying his life with his friends and workmates."
The Perth engagement covered flights and accommodation, but was not a commercial venture, Mr Karam said.
Justice conference advisory committee member Estelle Blackburn, who will interview Mr Bain, said his appearance was a "real coup" for organisers.
Mr Bain's case was of interest due to his successful appeal to the Privy Council, and like most high profile cases public opinion was divided.
"You can never convince the whole population," she said.
