Earlier quoted context omitted.
It seems like a company can only make one successful move at a time (in what I find a very ugly) industry. At the lower end Boeing struggles with the 737 being too large for a lot of markets. There Embraer, Bombardier (now part of Airbus), and a bunch of other companies seem to have an opportunity, if they can execute. It'll be interesting to see what Boeing does there given the cozy relationship with Embraer.
Bombardier is not a part of Airbus now, they just sold 50.01% of the C-series program to Airbus so that they could manufacture them in Alabama and dodge the 300% tariff imposed on them by the US government. It is unclear where the C-series airplanes for non-US markets will be made, but it's suspected to still be by Bombardier in Canada.
It's pretty clear—Canada. That said, there's a significant change: sales, and post-sales work, will mostly be handled by Airbus, who already have much more contact with many more airlines and leasing companies than Bombardier.