The message is already out and the precedent set years ago with studio buyouts.
People that primarily play COD are going to be considering losing access to it in the near future.
A lot of non-enthusiasts know this news already. Plus, 2023 is when more casuals will start to buy a PS5 or Series X anyway. That crowd still more likely has a PS4 right now. New consoles are so hard to get that most of the buyers now are more committed to the hobby. This CoD change will strike the fall that supply will be most plentiful and prices might even come down a little (perhaps with a redesign or something).