There's a Werribee bears in the NRL VIC comp so maybe West Melbounre bears? Or even better would be Greater Melbourne, the stronger league areas down here are the west, outer north and outer south-east. Obviously still play games out of aami, maybe even with a game or 2 in Geelong.
They would probably need to train somewhere else though, I remember reading that aami is basically at capacity for tenants (storm, victory, rebels, demons, tennis vic and vic olympic council), maybe at the new RL centre of excellence in Broadmedows?
I think Bris 2, Perth and NZ 2 need to come first, probably even Adelaide, but with the population growth down here being set to overtake Sydney in the not-to-distant future a 2nd Melbourne team will eventually be something the NRL will want