Under whose control are the new Four Horsemen? Bolvar's or the player DK's? I'd say the player's: On the Corrupted Ashbringer line, when you go to Acherus to talk to the Four Horsemen, the chick says "By the Deathlord" or something like that - not by the Lich King or something. I'm not sure if that's a clue but it bugged me the moment I saw that.