If the ARL has any sort of ambition they will do this -
Game 1, 2011 Four Nations: Australia v NZ at ANZ Stadium in Sydney
This game has so much more potential than 10-15,000 in London. If the ARL can promote it properly this game has the potential to be massive.
If the Kiwis can get 45,000 in NZ and Sydney can get over 70,000 to preliminary finals anything is possible.
Given Sydney's reputation a big crowd would be unlikely. I thin it should be played in Brisbane or Melbourne.
I don't think Australia vs New Zealand in league could become bigger then it is in rugby. The Bledisloe is hardly a massive event, anyway. The large crowds come in because it in the tri nations not for the Bledisloe Cup.