Havoc was released on 27th January for both Xbox 360 and Xbox One owners, so you probably already know what's involved by now. But, I'll remind you - there are four new multiplayer maps; Core (desert-based nuclear plant), Urban (close-quarters compound), Sideshow (an old inn full of clowns), and Drift (a Rocky Mountain ski resort).
The co-op Exo Zombies mode is also included, which features an all-star cast consisting of John Malkovich, Bill Paxton, Rose McGowan and Jon Bernthal.
A new weapon is thrown into the mix too, just to keep you on your toes - the AE4 directed energy assault rifle, along with an AE4 Widowmaker custom variant.
If you have purchased the Season Pass you will be able to the download the DLC straight away once the 26th comes around, otherwise you can just head on over to the approriate store (Steam/PSN) and buy the DLC separately.