Can't wait for the "God-King's" troops to become disillusioned with their souls being turn to rot and half of them switch sides creating a massive civil war that tips the scales towards Chaos. I can't imagine that'd ever happen though.
Now after Tomb Kings left GW for good suddenly the Empire of dust appears in Kings of War from Mantic. A totally original faction. They even have rules for the casket of Souls. I for one welcome our new Mantic Overlords! At least here i can use my Tomb Kings Army.