The promo trailer for Episode 516 of GTTV revealed the second Portal 2 DLC trailer will be screened for the first time this Thursday.
So far we know that Valve have been developing the Puzzle Creator, a test chamber building tool which can be launched from within the game. We also know that Steam Workshop will be employed for map makers to distribute their maps. But what else will this DLC include?
The first Portal 2 DLC provided time trialling for single-player and new co-op chambers. Perhaps we could also see new official single-player content with this update. Even if there isn't, expect plenty of third party maps to appear very swiftly.