As we told you back at New York Comic-Con, Ellen McLain, the voice actor behind Portal's GLaDOS, has a role in Guillermo Del Toro's upcoming Pacific Rim. Playing an AI.
As you can see in this new trailer, what this means is that, basically, she's playing GLaDOS in all but name. Well, all but name and maniacal intent.
Also, GLaDOS cameos aside, holy shit does this movie look amazing.