The first DLC for Darksiders II, Argul's Tomb, was released 2 early for all platforms, but only for some players. You can read more about it here. But as it's been customary with Vigil and THQ with this game, surprise! Game breaking bugs for the PC version!
Not my video, but I have the exact same problem. Paid DLC that is completely broken on release? Oh, boy, doesn't that sound appealing! I really don't know how to feel about this game anymore.