The November part of the date was pretty much assured already. Activision has released a new Call of Duty game every November since Call of Duty 2 way back in 2006. That title was an Xbox 360 launch title.
Since then, developers Infinity Ward and Treyarch have taken turns handling the game entries in the series. The last game in the series was Call of Duty: Modern Warfare 3, which was released on November 8, 2011 on Windows, Xbox 360, PlayStation 3,and the Nintendo Wii.
Based on the pre-order cards, we can see that this Call of Dutyn series entrant will be available at least on the PlayStation 3 and Xbox 360. As noted, Activision Blizzard will reveal the full details on May 1.