Airbus and Caissei don't think selling the reminder of the CSERIES to Airbus is a priority for BBD. There are lots of advantages to stay in a partnership with Airbus. They will stay partner for many years, imo.
Same with la Caisse, there are advantages to have La Caisse as a partner. And BBD is not in a position to buy anything. Buying back Caisse won't happen soon, and not even in 2-3 years.
But this is far in the future, no one really know.
JMO