Gearbox revealed during their PAX East panel that the fourth campaign DLC for Borderlands 2 will be out by the end of June 2013. The studio wasn't ready to show anything off, but they did offer a confusing little teaser video.
The video starred a few Borderlands characters as they played a game of Bunkers & Badasses, a spoof of Dungeons & Dragons. Tiny Tina was the dungeon master (badasses master?) and saw her explain the rules of the game while they killed time waiting for the Borderlands 2 vault hunters to deal with Hyperion enemies.
What could it possibly mean? We'll know soon enough.