The newest Borderlands 2 DLC is an arena-based battle. It's also a set of questlines in a campaign mission to become the biggest, baddest badass of the Badass Crater of Badassery.
What do you do when you visit the Badass Crater of Badassitude? You try to become the number one badass. Duh. The Badass Crater and your number one title await you in a new DLC campaign for Borderlands 2.
Gearbox, or rather Borderlands 2's DLC character Gaige, today announced the next chunk of campaign DLC.