Respawn Entertainment just hosted a livestream for their upcoming Expedition DLC for Titanfall where they unveiled a trailer for their DLC showcasing the 3 maps. Swampland, Runoff, and War Games.
Update: Expedition DLC and update will be available on May 15th for XboxOne and PC.
Along with this DLC there is a huge list of updates coming to all platforms. Check the list here: http://www.titanfall.com/game-update-three