Souths Logan is supported by the Raiders so you are basically saying you want two Canberra teams. Silly suggestion from the start anyway.
Then I don't see the point of your original question. Every team joining the Sydney competition/NSWRL/NRL since Penrith and Cronulla in 1967 has been a new venture, not an existing club. On that history, the use of an existing Queensland Cup club for a new licence is not going to happen. It will go to the highest consortium bidder as in the past.
Clubs like Redcliffe have no interest in risking what they have built up just to try to enter the NRL.
Bring back the Diehards as a new venture into the NRL. ;-)