Recently, ZeniMax filed a trademark application for "The Brigmore Witches" and "Void Walker's Arsenal". Not much is known about either of these phrases, and ZeniMax has yet to comment on either trademark, but since "The Brigmore Witches" is a phrase found mentioned within the written lore of Dishonored and the Void is the dimension where Corvo meets with The Outsider within the game, it is speculated that new DLC for Dishonored is on the way, or possibly a sequel or spin off game. Or it could have nothing to do with Dishonored. It could be entirely related to a completely different project. Time will tell.