The West Coast Pirates are ready to go now, and by rights they should get in before any of the current Brisbane bids.Can Perth happen after Brisbane2 or even maybe Brisbane3/sunshine coast earn the NRL extra $$ in new TV deal ?
Expansion would undoubtedly add value to the broadcasting rights, the real question is how much and what would maximise that profit.
Brisbane 3 is a bad idea so long as there are 9 teams in Sydney, it's just to many eggs in to few baskets and you'd almost certainly split the Brisbane market to thin.
Finally, an NRL team based on the Sunshine Coast is a pipedream. It's doesn't have a strong backer to support the club (such as a wealthy league club), and without said backer it's too small to support it on it's own. Even if a wealthy reliable backer could be found the license would still be better given to a team in a larger metropolitan market which will create a bigger return for the league and sport in the long run (i.e. Brisbane, Perth, Adelaide, or Melbourne).