I reckon, if Flashpoint becomes a national program (which I can’t see happening in the short term), presenters for these markets would be:
Sydney - Michael Usher (Angela Cox or Angie Asimus would replace him on The Latest on Mondays only)
Melbourne - Naomi Robson (she’d be brought back to the network)
Brisbane - Kay McGrath (she’d work three days a week)
Adelaide - Kelly Nestor (I think she works in one of the Adelaide papers these days)