Titanfall was released for Xbox 360 only last Friday, but the Xbox One version has been out since March 11th. This DLC pack is the first of 3 due out for release, and shall include many new features as well as 3 new maps: Runoff, Swamplands and Wargames.
At the moment all we know is that this DLC is due out in March. Also included in the DLC is the ability to customise your Titans with decals. Also, and we are not sure how this is going to work, but you will be able to meet up with players using hashtags!
Of course, once we know a release date and more news about decals and hashtags, we will let you know!