Targeted for release in early spring, “The Passing” takes place just after the Dead Center campaign of L4D2. Set in a small town in rural Georgia, players assume the role of the L4D2 Survivors as they meet with the L4D1 characters.

In addition to the new co-operative campaign and associated narrative, “The Passing” will include new arenas for Survival, Versus and Scavenge mode and introduce a new co-operative challenge mode of play. The Passing will also include a new “uncommon common” zombie class, melee weapon, and firearm.

Read more: http://www.wouldyoukindly.com/left-4-dead-2-dlc-the-passing-announced/#ixzz0Zig3R5ip

I hope you don't run into the old characters that are just bots. That would be pretty weak.

I hate carnivals

I hate tents

I hate slides

I hate malls

I hate mardi gras

I hate swamps

You know what I don't hate?

I don't hate the Midnight Riders.