The two Australian themes I have thought about are V8 Supercars, and a seven sights of Australia one.

The V8 one is fairly obvious, the sort of ideas I had involved choosing either Holden or Ford and then winning a series of races (with rewards at the end) by shooting lanes, culminating in the Bathurst 1000 for example. Targets could be used to achieve pit-stops or similar. I guess there would be a multiball in there somewhere as well, maybe for making a ramp shot.

The seven sights of Australia is where you travel to different famous sights in Australia by completing targets, lanes and a ramp shot. Sydney Harbour with the bridge and the Opera House, Uluru, the MCG in Melbourne, etc (one for each state), with a finale in Canberra maybe?

Feel free to use these or ignore them.