Great post Mike2010, BTW. I definitly agree that there's too many clans active in Canada for it to be considered all one big conspiracy, as people who are unfamiliar with the way the Ndrine cells are structured and operate are wont to do.
The shifting fortunes of Calabrian elements and the Rizzuto's make's for definite intrigue, but so much has gone on for them (since Vito's imprisonment) on too many different levels. Im not saying Calabrians aren't possibly involved, just that there could be a number of other elements also making power plays.