Steam News has word that Portal 2 and Left 4 Dead 2 will be featured on the next episode of GameTrailers TV on Spike TV, which is in the wee hours of Saturday morning, though as usual this is referred to as Friday night. They promise new footage, which implies new L4D2 DLC is coming, which is supported by a comment on the Left 4 Dead Blog, where word is: "While waiting for DLC news to be announced on Game Trailers TV at 12:30am (PST) this Friday on Spike TV, we thought we would see what the community has been working on."