I think I've read that all Aus car manufacture will have stopped by end of 2017 - maybe October. Ford have recently stopped, leaving only Holden and Toyota still operating for a few more months.

So Holden becomes rebadged imports. I'm sure PSA will be happy to keep supplying GM with Opels if it's a profitable direction - it looks as if existing Opel and Vauxhall models will continue to be made for a few years, so PSA might as well keep all opportunities open. GM will probably stipulate licencing arrangements for PSA to take over these product lines, so can add a few clauses to cover continuing supply if they want.

This is a parallel scenario to how GM killed Saab - GM licenced Spyker after their buy-out for continuing access to the Vectra-based GM technology (engines/floorpan etc) in the 9-3 and 9-5 to enable production, but then when Spyker collapsed they refused to consider allowing Chinese bidders have a licence. So Saab was fatally paralysed by GM despite being totally separated. The only assets available were the Spyker-owned factory and rights to the brand, which was not a particularly attractive package without the rights to continue existing products.