To expand on my earlier post, it seems to me the clubs which are squeezed in terms of their population base are Souths, Cronulla, and Manly. There really is only room for one of Souths or the Roosters in the inner city/eastern suburbs area. Cronulla are hemmed in by St. George and Illawarra. Manly could theoretically expand west and north, but I would hazard a guess that neither North Sydney or the Central Coast would want them, and they themselves probably wouldn't be interested in looking outside their own insular little hamlet. If the Bears get the gig though, Manly suddenly find themselves in the same basket as Cronulla.
These three clubs, and arguably the Roosters to, do not have the population base to sustain themselves. Souths have a massive fan base, but a very small part of it would actually exist in their geographical base, suggesting they wouldn't lose too much by moving (other than their own stupid pride). They could still claim the South Sydney junior base if they moved (hey, they could even be nice and give Randwick back to the Roosters
), in the same way that Melbourne did with the Central Coast and Brisbane Norths. Personally I think playing out of Homebush is a tacit admission that they cannot sustain themselves long term out of their traditional base, but I'm not holding my breath for the penny to drop for the stubborn pricks.
The Roosters are in a similar boat, except for the fact they have a lot of money. Souths do too, until such point as Rusty gets jack of it, or loses his movie star profile and can't afford to use them as his plaything anymore.
Cronulla are up sh*t creek without a paddle, there is no two ways about it. The sooner the NRL taps them on the shoulder, suggesting a move elsewhere, with a promise of long term support if they do, the better for everyone.
Manly are not quite in as big a pile of sh*t as Cronulla, but they will be once the Bears get in. I'd also be tapping them on the shoulder and offering long term support to move elsewhere.
The other team that should probably be mentioned is Penrith. They have a fairly small population base. What they need to do is take advanatage of their mega-rich leagues club and start staking claims to surrounding areas, which are growing rapidly. Blacktown is the obvious piece of unclaimed turf, but I'd also be looking South (plenty of development happening and planned in the corridor between Penrith and Campbelltown, which is currently largely unpopulated), and West into the Blue Mountains. Forget about being the team from the foot of the mountains. Lay claim to being the team for the mountains.