I got an e-mail back from ARC yesterday, they're having Rally Calder as an ARC event every 2 years, with Rally Australia (WRC event) held in Victoria on the other years. There will 'definitely' be a Forum Battle in 2014 though, with extra events and more track time in the planning.
Although it does give plenty of time for people (Qld/WA members

Plus, it sits in the gap year of the FPV day, which is handy, because AFD is around the same time as well.