Looks like the US have a release date for The Rover DVD. Not 100% sure if this is gospel, but it’s something to look forward to. According to Walmart you can preorder Blu-ray + Digital HD and DVD + Digital HD by clicking on the links.
Thanks @FeistyAngel for the Walmart tip.
Aussies can be notified of availability by signing up for notification at EzyDVD here
You can also preorder on US iTunes and Australian iTunes
Updated: Amazon France have the release date for The Rover on Blu-ray & DVD listed as October 13 2014 & both can be pre-ordered. Blu-ray here & DVD here.
And Amazon.ca have the DVD available for pre-order here.