Call of duty recently announced that warzone and vanguard will be live on December 8. In one of their tweets call of duty also showed a trailer.
call of duty season one was delayed because of Resignation of boby kotick and amid the protest at activision blizzard. It has been announced that vanguard and warzone will be released on December 8, The same day as the halo infinite campaign. Here is the tweet
Now call of duty will be released on December 8.