Gearbox's next wodge of Borderlands 2 DLC is Sir Hammerlock's Big Game Hunt, as revealed on the official forums by watchful fans. Polygon has since confirmed the pack's title with Gearbox, but you'll have to wait a little longer for details on the contents.
A number of PlayStation Trophies point to hunting missions (well duh) and a number of new "named locations". According to a Gearbox rep: "there are still two add-on campaigns scheduled to release as part of the Borderlands 2 Season Pass and we are really looking forward to sharing news about our third add-on campaign and other downloadable content soon."
As you'll know if you've played more than a half-hour of Borderlands 2, Hammerlock is the chap with the prosthetic limbs you encounter in the first village. He describes himself as "a scholar, a gentleman and a hunter", not necessarily in that order. Which three things would you describe yourself as? I'm going with "a pauper, a sadist, and a lapsed member of the animal kingdom".