There have been rumors that Arcadi had fallen out of favor when Rizzuto returned to Montreal because Arcadi had made his own coke deals back in the days. Plus during Arcadi's tenure as street boss war broke out that eventually led to the murder of Nick Rizzuto. So it would be suprising to say the least if Arcadi will be named the new boss as if nothing ever happened. I'm sure there are still a lot of people who hold a grudge towards him and along with his notorious hotheadedness that might lead to a new uprising. Time will tell.

Also, there are no 150 made guys in Montreal. Rizzuto himself was quoted saying in 2001 that there were 19 made guys in Montreal. These guys formed the old Bonanno crew that became disfunctional after Sciascia was killed as he was the direct link between Montreal and New York. However, the Montreal Mafia does have hundreds of associates, many of whom are of Italian descent. So in terms of muscle they can compare themselves with a New York family. But the Montreal Mafia consists of multiple factions.