Yeah, it should be a formality for Canada and Australia to pick up the final quotas, though in the very unlikely event Australia fails to advance to the cup quarters, I'd watch any match between France and a European team for potential match fixing...
The European qualifying tournament will be very important as it pretty much decides which two nations will grab the final two qualification spots, even if Brazil, China, Fiji or South Africa (should they compete) fail to win their continental qualifier the European teams will be a massive favourite.