I think the Northwest (meaning Oregon/Washington) is a very likely candidate to go to a district system soon. I've seen a couple people from high profile teams out in that area snooping around MI this year, but that isn't necessarily an indication of anything.
I am also a fan of a combined Hawaii/California region, and have heard rumoTrs of a combined Wisconsin/Minnesota region and a combined Indiana/Illinois region.
Nobody has mentioned it yet, but I figure I might as well throw out the idea of Israel going to a district system.
Now regarding Canada, I could see them going to their own region, but probably only under one condition, an option which I've been a supporter of since Day 1 (And I'm in MI so thats a long time ago
), and that is Cross-Region travel.
What is to stop a team from say, Michigan going to a MAR district and earning points that qualify towards the FiM state championship? As long as you still play the same 12 matches as everyone else, the points you earn should be the same, its just they count towards your own Regional Championship. I just think there shouldn't be a problem with crossover like this once (theoretically) all of FIRST goes to the district system.