Gimmicky as it is, I do like the international rules, but it would almost certainly have to be killed off to allow for a SoO series, which would certainly be best held around the time the IRS takes place. Having said that, whether it could sustain the interest of both players and fans year-on-year is another thing.
Additionally, the Allies concept should be abandoned, but some states/territories wouldn't have nearly enough talent to be competitive, and leaving them out altogether would be seen as a cruel rejection, reducing interest in those states. Which could mean that only the usual Vic/SA/WA are involved, which could leave one of those out in the cold were it a once-a-year match - again reducing interest in that state.
Unfortunately, all this means that it's highly unlikely SoO will happen in any meaningful fashion any time soon.
I would like to see SA versus NSW to test this assumption