Ok I'll bite on the hypothetical....with the caveat that none of us have any idea which players will do what so it's all a huge guess. I think uncontracted (to CA) players would grab the chance. After all, they could earn a contract and they may never get another chance.
Cowan (c)
Daniel Hughes
Khawaja (I feel like, after India, he'd just want to fking play)
Ferguson
S Marsh (not contracted and will want to prove that's a mistake)
Nevill (as with Marsh)
Faulkner (iffy on this one. He's clearly pretty pissed with CA. But then, it's test cricket)
Coulter-Yangtze
Copeland
Sayers
Swepson
Cameron White if Faulkner tells them to stick it.
But again, I doubt this will be necessary. If nothing else, CA will buckle. They crave money, and this Ashes with the potential of Starc, Haze, Cummins and Pattinson ripping the poms to pieces will provide plenty.