Borderlands has joined the number of games who have released they will have a season pass
The season pass will cost $30 or 2400MSP and include four DLC expansion packs (added campaigns) in addition to the mechromancer the season pass does not include it
Those who dont buy the Season pass the cost of each dlc expansion will cost $10 or 800MSP
GearBox also hopes to have all DLC's out by JUNE 2013
SEASON PASS IS NOW ON THE MARKETPLACE FOR XBOX AND PS3
The First and Second Dlc's have been satrted and are almost done the third is still being worked on as in making a story for it

So far the only DLC class we know of is the Mechromancer
The DLC class Mechromancer which offical name is Gaige is Free to those who have preordered Borderlands 2 and gained access to the premiere club
Those unlucky people who have yet or cant preorder borderlands dont worry
On October 16 about a month after the release the Mechromancer will be available to download for those who preordered for free and others will have to pay $10 or 800MSP

As we know Gearbox is we hope they will push them selfs to create another class

For those who missed here are the prices of each thing
Season Pass-$30 or 2400MSP
Solo DLC (campaign addon)-$10 or 800MSP
Mechromancers-Free for preorder / $10 or 800MSP
*All prices are US if you would like ill add UK prices as well