hen a Thresher Maw comes out of the ground and attacks the Reaper. The Thresher gets the upper hand by coiling itself around the Reaper, then drags it underground. It gets quiet, and seems to be over, then laser fire begins erupting from the ground, and Shepard decides this is a good place not to be. It then trails off into a description of how everything is so much bigger than the previous games.
It sounds like everything I wanted to be changed/added from ME2. No mention of Liara or Miranda in GI at all? It seems impossible that they would completely take out two LIs from the previous game, so hopefully they'll be adding more companions/character appearances in the coming months.