"The final part of Valve's presentation included a new trailer designed to show the story of Episode 2. In it, the G-Man starts out by standing over Alyx's knocked out body and saying, "You're not supposed to be here -- forget about all this." From there, the various strider and enemy troops could be seen crossing a bridge in unison, followed by a montage of scenes from the game.
According to Valve, the new Episode 2 trailer will be released publicly early next week in a high quality format."