I was thinking more along the lines of -
Week 1 - Grand Final in NRL and SL
Week 2 - Indigenous All Stars Vs NRL All Stars - minus anyone playing in the WCC of course. Also, this would be the perfect week to have the Tonga V Samoa game that everyone got a fat over and then seemed to forget about after the World Cup.
Week 3 - World Club Challenge. Because the NRL GF will likely always be held in Sydney, this gives Suncorp, Etihad, etc, the opportunity to host a blockbuster club game. Alternate the hosting nation each year - England, then Aus, then England - but beyond that sell it to the highest bidder.
Then take a few weeks off, and if there is an international series scheduled, play it then. But really hype the shit out of the WCC. Instead of something that only the fans of the team playing care about, build it up to be a game of importance. It is after all the World Championship. It deserves more, and will only get more recognition if it's utilised properly, instead of remaining a trial match between two teams loosely related to last year's premiers, playing at 3AM Aus time a million years after their Grand Final victories were relevant.