If the Tomb Kings won't have a working economy within the MTW2 engine we always have the option of making them a non-playable horde faction. Like the Mongols or Timurids. It's not like we can't play undead anyway. And if we really do want two playable undead factions, (besides the Von Carsteins) we've always got Lhamia we can throw in there. I know they where conquered by the pre-Tomb kings, priest kings of Nehekhara, but they're pretty much the same faction as the Tomb Kings, only that they've got living citizens. It's only the leading Lhamian elite that are/where vampires.

How about it?