According to Walking_Target, the upcoming content could be "a new special infected, a new campaign, or new weapon(s)." Considering the fact that the Crash Course DLC lands this month, and Left 4 Dead 2 shambles into stores on November 17, that leaves one empty month in between for this mystery content -- that is, unless Valve plans on releasing it after L4D2. This would of course put us in a compromising position: Buy Left 4 Dead 2 and potentially miss out on the original game's DLC, or download the first game's DLC and maybe permanently delay a purchase of the sequel? We've contacted Valve for more details to help us (and you!) solve this particularly problematic predicament.