Personally, I think the more interesting question is who's going to replace Abbott or Gillard as party leader depending on which of them loses the negotiations.
Is Abbott necessary going to get kicked out as Coalition leader even if he lose the negociations though, considering the elction was so close and that Abbott still made a better effort than anyone expected. I don't know how these things work in Australia, but in Sweden at least a leader who greatly increased his/her party's numbers, even if they failed to win goverment, wouldn't necessary be kicked out.