See I played that same scenario out in my kind as well and I think that's probably the closest to actuality. But I also have heard and kind of think myself that its quite possibly Ndrangheta which are out of Toronto. Their are from what I've researched 6-7 clans in Toronto who have taken control of the drug market these days in the majority of Canada and have been directly linked to Cartels and even this guy they just picked up in Colombia who is basically the broker for cocaine and also a big time boss in the Ndrangheta. The Rizzuto's have had far back rivalries with Calabrians. I don't know though, I would say your opinion is the most likely but this Ndrangheta scenario I feel is also very possible.