Interesting article... some perspective on the situation
https://skift.com/2017/05/11/years-after-spinning-off-its-loyalty-program-air-canada-will-create-a-new-one/
says AC and AIMIA could reach a deal to let Aeroplan members use their points in an orderly manner...AC limits the number of seats available for Aeroplan, so some are saying that "billions of points" will be suddenly presented for redemption...of course this is not possible , but a deal with another airline or as mentioned, some mutually beneficial extension plan could be in the works.