We'll see tomorrow, but I'm not convinced this wasn't all planned. Negative marketing is a thing, and if they had assets left over from earlier development, it would have been a cheaper trailer to make. People are talking about how absurd the trailer was, and that's a far, far better marketing result than apathy.
So we have action in this ARPG. I wonder if they are confident enough to show RPG bits before launch. Judging purely by the trailer, the game feels nothing like DA.