Treyarch has teased the return of Zombies in Call of Duty: Black Ops 4 with a tweet with a picture with the tagline "Mankind's Reckoning Will Be Its Salvation". With the rumors abound that this year's Call of Duty will be dropping single player we could be a much larger Zombies mode for Black Ops 4.
Treyarch and Activision will be announcing everything on May 17[sup]th[/sup] revolving this game so we will just have to wait and see. Check out the above mentioned Zombies teaser tweet below.
twitter . com/Treyarch/status/994274637646368772/photo/1
Call of Duty: Black Ops 4 will be releasing on October 12th 2018 for Xbox One