ATR42, now that's a big jump and very hard to believe. If they make the move to a larger aircraft type, the Saab would have to be the choice given PC's has previously operated the type and I think their current CP flew them at Vincent.
I was in Cairns yesterday and the Beech 1900C (VH-EMK) is parked next to West Wings hangar so it would appear it will be joining the fleet very soon.