Money will determine it but I reckon the "peace" will only last until one of the majors replenishes their warchest for another election. They are both broke ATM.
Once they have some cash they will only need a trigger blaming the greens and inds! That bit is important. You remember their bipartisanship when Paulene threatened their cosy duopoly? You will find that overtly on the part of the Libs and covertly on behalf of Lab they will both have the same goal: Reinstate the duopoly!