It looks to me like Vesalainen will be on the opening night roster.
That means:
* Dano and Petan as the extra forwards
* Morrissey-Trouba, Morrow-Buff are seeming likely as the top 4
* Chiarot and Kulikov competing for the spot with Myers
* Niku and Poolman back with the Moose
I'd suggest Niku is probably the first callup if a lefty gets injured, and might jump over Kulikov or Chiarot.
I don't think it's completely set in stone yet. They are giving him every chance to make it but ultimately I think they'd prefer having him play for the Moose if they can.