"Yes, another QuakeCon leak! Better late than never, right? The good folks over at GameBinge sent us a video showing the beginning of the game where Sebastian and his team arrive at Beacon Mental Asylum, if you are wondering why the Butcher Lair in the end looks different from what we've seen on the E3 footage, its because the QuakeCon demo is a newer build, according to Jason Bergman (TEW's Producer) the game "has changed a lot" between those builds. Anyway, you can check the video in the post below. Many thanks to GameBinge for filming the footage!"
There's Additional links at the source in case this gets taken down by Bethesda.