There isn't enough fixtures to stock a stand alone weekend.
As nice as it would be to have a Kiwi Origin and some PI round robin comp, the game isn't strong enough yet and it would completely kill the momentum of the comp even more so than now.
I disagree. At the moment it interrupts Rd 12 through to 19, which is a sizeable chunk of the season. Plus the weeks proceeding origin the talk about it and importantly the valuable advertising ramps up significantly.
Fixtures involving the Kiwis, pacific islands, PNG etc.... would provide enough of a sideshow for kiwis. Maybe in the pacific cup format, which would then continue post season. Possibility of English involvement, if the RFL saw fit to have an international window in the re-structure.
An alternative could be a 9's circuit during the origin weeks. 2013 Example:
Week 1- Sydney origin, Auckland 9's.
Week 2- Brisbane Origin, Melbourne 9's.
Week 3- Sydney Origin, Brisbane 9's.
With two origins this year, my theory would have the 9's played elsewhere than Sydney. When Brisbane have 2 origins its vice versa.
Put up serious prize money as is proposed by the Auckland 9's currently and the clubs will happily be involved. 4 groups of 4 clubs; play teams in group once and top 2 in each qualify for QF's, semis, final.