Are you under the impression that Calgary needs more cap space?What about something around Hubs to MTL with Anderson and Gallagher going the other way?
MTL gets the better player, Calgary gains slight cap this year + the next 2 (to stay above the floor) but both end after the 26-27 season.
Not sure who would have to add, or even the appetite for such a deal. But if Calgary trades Hubs now this is more the style of move I see (taking on overpaid guys rather than 7yrs of retention)