It's been a few months since Borderlands 2 has received any new content. It's been even longer since the game has received a new playable character. That all changes in May.
At PAX East, Gearbox Software announced that Krieg the Psycho will be joining the cast of Borderlands 2. He's the first new character to join the vault hunters since last year's Gaige the Mechromancer. Krieg will primarily be a melee character, but he has a few ranged abilities as well. He will be available as part of the Psycho Pack in May for $9.99.
Joystiq is also reporting that Gearbox will sell a Vault Hunter Upgrade pack in April for $5. This DLC pack will increase the game's level cap from 50 to 61. It will be available to all those who purchased the Season Pass. It will also feature a mode for those wanting to play through the game a third time called the "Ultimate Vault Hunter Mode."
Those anticipating the final piece of DLC for Borderlands 2 won't have much longer to wait as its expected to launch in June. After that, it's anybody's guess where Gearbox will do with the Borderlands franchise. My bet is on a third game for next-gen consoles.