Maybe this idea exists and its already done, but I think it would be nuts that us the community decides every year an old CoD to play and revive its servers. Now everyone is playing at bo2, a 14 years old game. It won’t be impossible to announce to the hole community each year to play a different old CoD like bo3, cod4, mw2…
If this works, a lot of people like us that loved and was raised along with the gold era of Call of Duty can live those experiences again. Also the new players will play and try the games that did CoD what it was!