So in the first trailer, you see Alyx, appearing to be dead, being carried off by a vortigaunt. And in the second trailer, you see Alyx laying in G-Man's stasis room, where he was keeping Gordon (or at least thats what it looks like). He says "You're not supposed to be here". Perhaps the vortigaunts sent her to stasis there until they can revive her using some ubervortimagic or something? What do YOU think?