A sales update on the Left 4 Dead blog actually reveals some stuff. The Fallen Survivor?
Coming out this Spring for Left 4 Dead 2 is the brand new DLC "The Passing", which contains:
A Wicked Witch Bride! A Gargantuan M60! A Slashing Golf Club! And Introducing The Fallen Survivor! Meet 3 Left 4 Dead 1 Survivors! New Game Modes!
Was that a typo? Game Modes? Didn't we mean Game MODE? Did we mean to include that "S"?!?!?
YES WE DID!