UPDATE: Going out on a limb here but I'm pretty sure the info from PAX Australia is the same info that Gearbox will release to SDCC.
Ultimate Vault Hunter Upgrade Pack 2 will cost $5.00. The pack raises the level cap to 72 and adds the Digistruct Peak Challenge – a “training course” map that pits you against digistructs of enemies, letting you face off against enemy combinations you wouldn't normally see in the base game. This DLC WILL NOT BE PART of the Season Pass.
Also announced Headhunter Pack: T.K. Baha’s Bloody Harvest, which will be released before Halloween and focus on T.K. Baha from Borderlands 1′s DLC The Zombie Island of Dr. Ned.
Are you still playing Borderlands 2? Do you enjoy DLC? Then Mr. Pitchford has some interesting news for you. Of course, there are little to no details yet-- like skins, characters and such. Also if you own a season pass there's a good chance it WILL NOT work. I know this sounds like kind of a bummer but I will say they fulfilled that pass quite nicely. We'll find out more tomorrow at San Diego Comic Con.
@mr_raccoon Saturday, yes.
— Randy Pitchford (@DuvalMagic) July 18, 2013