There is a new rumor going around that there will be a new DLC. It is named "The Passing". Set in a time after The Perish you are in a small rural town in Georgea. The DLC is speculated to include new weapons, uncommon infected, and new areas for Scavange, Survival, and Versus. Also it is said that the cast from Left 4 Dead 1 will meet with the cast from Left 4 Dead 2. Is this true, only time will tell.