Tonga and Samoa are scheduled to meet at CommBank Stadium on November 1, one of the 2026 Rugby League World Cup's marquee fixtures.
The tournament begins on October 15, when Australia faces New Zealand, and the competing nations have now named their squads.
Australia will defend its title under captain Isaah Yeo, after beating Toa Samoa in the 2022 final at Old Trafford.
Six Australians are marked as debutants: Bradman Best, Jack Bostock, Blayke Brailey, David Fifita, Jacob Preston and Sam Walker.
Samoa's squad includes Stephen Crichton, Jarome Luai and Spencer Leniu as the 2022 finalists seek another strong campaign.
Tonga will look to forwards Jason Taumalolo and Addin Fonua-Blake to lead its challenge.
England's match against Tonga in Perth on October 17 is another highlighted fixture.
The announced squads also include players from the Cook Islands, Fiji, France, Lebanon, New Zealand and other competing nations.