The Slingshot Content Pack will soon take XCOM: Enemy Unknown to the unfriendly skies over China.
If more XCOM is what you want, then 2K and Firaxis have some good news: The Slingshot Content Pack, the first of two planned single-player DLC releases for XCOM: Enemy Unknown, is on the way. Slingshot will serve up new linked Council missions in which players meet an "enigmatic Triad operative, divert an alien ship's course and do battle with the aliens in the skies over China." Three new maps, a new squad character with unique voice and background - the aforementioned Triad, I would assume - and new character customization options will all be included with the package.
Also up for grabs is the Elite Soldier Pack, originally available as an Enemy Unknown preorder bonus but which can now be had by those who didn't fork over their cash up front. The Elite Soldier Pack adds the Classic XCOM soldier, complete with blonde flat-top haircut, the Soldier Deco packs that offer a range of unique XCOM armor customization options, and "complete color customization" that give you total control over your squad's style profile.
Release date and pricing information for the Slingshot Content Pack have not yet been released, although 2K says it's "coming soon." The Elite Soldier Pack, on the other hand, is available now for 400 Microsoft points on the Xbox 360 or $4.99 on the PlayStation 3 and PC.