XCOM's Slingshot add-on will be available from later today, presumably once the Steam engine rumbles to life and starts pumping out releases. The pack adds three new China-based Council missions that will integrate into your campaigns. In preparation, Firaxis have released this video teaser of what those missions involve.
Yesterday we let our speculation over XCOM's inevitable DLC run as rampantly as a panicked Sectoid, but 2K and Firaxis have their own vision for XCOM's post-release content. Today they announce the impending deployment of Slingshot, a tri-Council-mission campaign set in a besieged China featuring a new playable squad character, enhanced customization options, and a couple research shortcuts.