BioWare sent emails to fans overnight that include a "Nightmare" teaser trailer for what appears to be a new intellectual property. The video is live action, so it's hard to say what this will be other than "Hey, the guy with the head made of smoke was kinda cool."
There's also a website which hints at a gamescom reveal: "The time is near. They are watching. Your power is rising. Cologne, Germany. You've Been Chosen."
Wouldn't it be "funny" if this was somehow related to Dragon Age: Inquisition. Yeah, "funny." (For the record, I do think it is a new property -- but at which BioWare studio? Austin?)