I should know better than to wade into this never ending debate, but I'll do it anyway.
This is a progressive rebuild idea and most people on here will probably hate it.
I think that the outer suburban teams in Sydney need to consider relocations as serious options.
To achieve national expansion, and to ease the financial pressure in Sydney are the 2nd and 3rd reasons. But the 1st and main reason is - I think there is a bigger, brighter future for those clubs as city clubs than there is as suburban clubs.
A key supporting pillar to this would be to restructure the NSW Cup to a better competition more representative of the state, with historical and regional clubs as feeders, rather than a half reserve grade half feeder with most clubs in western sydney and almost zero regional representation.
The NRL should financially incentivise the following moves:
1. Dragons -> Wollongong (full time). St George Dragons to play in NSW Cup at Kogarah.
2. Sea Eagles -> Central Coast. Manly-Warringah to play in NSW Cup at Brookvale. Norths junior boundaries to be officially removed and redrawn such that Sea Eagles have the upper north shore and the lower is merged with Roosters.
^ Rationale: As regional city teams, regions set for big growth, they will attract more government support and investment than in the suburbs of Sydney. Sydney is also set for big growth, yes. But the way investment is targeted means that the suburban regions will always get less attention than the CBD, Parramatta, and soon the new Western "Aerotropolis". see: Newcastle, Townsville.
Dedicated fans and sponsors are also an advantage. While Sydney has more potential fans and sponsors, they are also spoilt for choice, leaving clubs fighting tooth and nail every day. Regional city support gets clubs out of that fight.
There has been talk of upgrading some or all of the suburban stadiums in Sydney, but I'm both wildly sceptical it will actually happen and don't really agree with it as the best way forward for either the city or the NRL.
3. Sharks -> Adelaide. Cronulla-Sutherland to play in NSW Cup at Shark Park.
Cronulla are consistently at the bottom end of every financial measure you can look at. A fresh start in one of Australia's capitals, while retaining their junior region and historical local presence in NSW Cup, would position them comfortably to grow into a powerhouse on and off the field. As the OP in this thread mentioned, Adelaide has quality stadiums, loyal potential fans, huge financial potential. The brand is a good fit. The rivalry with Melbourne would go up another notch.
4. Wests Tigers -> Perth. Western Suburbs to play in NSW Cup at Campbeltown. Wests and Balmain to both run in Jersey Flegg, Ron Massey and Womens NSWRL.
Tigers represent an area that overlaps multiple other clubs without seeming sure of what they actually do want to represent themselves. A capital city move could let them move fully forward from the Balmain and Magpies days, and reposition themselves as one of the games top clubs. Perth is an opportunity begging to be taken. The leg work has already been done. The fanbase is wanting. Tigers have the most to gain, without even changing their branding. Roosters, Souths, Eels, and Bulldogs will always push them around financially in Sydney. With a parochial city the size of Brisbane behind them, they could be the next Storm or Broncos.
NSW Cup:
In addition to the above 4 clubs retaining their local historical teams, NSW Cup should be restructured so that feeders to NSW/ACT teams are either a) a historically significant former first grade club or b) a regional club.
Which leaves us with:
NRL - NSW Cup
Sydney Roosters - North Sydney Bears
Canterbury Bulldogs - Newtown Jets
South Sydney Rabbitohs - Albury/South West
Parramatta Eels - Tamworth/North West
Penrith Panthers - Bathurst/Central West
St George Illawarra Dragons - St George Dragons
Central Coast Sea Eagles - Manly-Warringah Sea Eagles
Adelaide Sharks - Cronulla-Sutherland Sharks
Wests Tigers - Western Suburbs Magpies
Canberra Raiders - Nowra/South Coast
Newcastle Knights - Port Macquarie/North Coast
Auckland Warriors - Auckland Warriors
Brisbane Broncos
Gold Coast Titans
Melbourne Storm
North QLD Cowboys
(and 2 obvious expansions in South Queensland and NZ South)
The 2 obvious criticisms i'm going to get:
1. Roosters should be relocated, no juniors no fans!
Aside from these likely criticisms being factually incorrect - the Roosters are the most successful club in Sydney on and off the field, and is the only club playing in the wealthy inner city. They're the major tenant in the new stadium.
Local juniors don't matter in professional sport, but if they did, the club has an arrangement with Norths and pathways through the Central Coast anyway.
If I own 9 stores, and want to expand my reach but have limited resources, I'm not shutting down my most successful franchise, i'm pruning the weaker ones.
2. You can't relocate Manly/etc or this part of Sydney won't have a team!
Not every part of town needs a first grade Rugby League team. And in particular reference to the north shore, the existing teams aren't doing a particularly good job of representing that area anyway. Leaving that area as official Norths junior region has been a failure. It should have been divided up between Manly and Roosters 15 years ago.
A restructured NSW Cup will ensure that every region of Sydney and NSW has a 1st or 2nd grade professional team.