It's no surprise that Borderlands 2 was in development, but now it has been officially announced. We have the press release, first teaser image, and information on where you'll be able to get your first look at the new game:

2K Games and Gearbox Software Announce Borderlands™ 2 in Development

"Fans can get their first glimpse of the bold evolution of the Role-Playing Shooter at Gamescom and PAX Prime 2011 this month

New York, NY – August 3, 2011 – 2K Games and Gearbox Software announced today that the sequel to the extravasplosive breakout hit, Borderlands™, is currently in development at world-renowned developer Gearbox Software. Coming to the Xbox 360® video game and entertainment system from Microsoft, PlayStation®3 computer entertainment system and Windows PC during Take-Two's fiscal year 2013 beginning on April 1, 2012, Borderlands 2 is the epic sequel to the ultimate four-player Role-Playing Shooter loot fest. Combining invention and evolution, Borderlands 2 features all new characters, skills, environments, enemies, weapons and equipment, which come together in an ambitiously crafted story. Players will reveal secrets, and escalate mysteries of the Borderlands universe as they adventure across the unexplored new areas of Pandora.

2K Games and Gearbox Software are taking this show on the road, and fans and media will be able to get their first look at the game at Gamescom 2011 from August 17 – August 21, and at PAX Prime (Booth #3417) from August 26 – August 28. Eager gamers can learn more about Borderlands 2 right now by picking up the latest issue of Game Informer Magazine, which has the worldwide exclusive cover story on the title. Readers will find many game details inside the issue, including the first reveal of one of the several new character classes being introduced in Borderlands 2."

Here is your first look Borderlands 2 art from the cover of Game Informer: