I have a strong feeling, all the groups played a huge role in ousting crucial figures.
Then, they turned on each other.
Montagna became over confident. Thinking, he can fast-track his way to power.
DiMaulo/Desjardins felt it was their opportunity. They were not ready to allow a former under-boss from nyc, step over them.
Arcuris carry no weight/balls. All they can contribute, is their contacts in the Montreal area and their loyalty to nyc.
I think, all the parties will have a great deal of explaining to do. If Vito can restore his previous reign, somehow.
Now, unless the Violis in Hamilton factor themselves into the mix. Vito will have to deal with his greedy, opportunistic members and/or retribution from the past.
I'm breaking out my popcorn for this.