Looking at those options you have listed:
If they still had the SpeedSeries, I might have thought a chance, but probably not now.
They do have relationships there (Peter V’landys through the NRL and the VRC through their Melbourne Cup deal), might be tough to match Seven’s 52 weeks of racing.
Signed this year through 2031, and I wouldn’t think there would be much interest.
If they happen, and you would probably want them on the cheap
This one they will likely go hard after, it is one of the key backbones to the Stan Sport platform (along with Grand Slam Tennis).