Excuse me for butting in here, but just what ARE the "pre-ordered" units? I know the air drone is one. What are the others? Pre-ordered units are special unit that those who pre-order E:BFD! The units include Air Drone-Atreides, Air-Defense Platform-Harkonnen and the ordos Air Mine. If you didn't pre-order Emperor, don't worry Westwood will take out a patch later on that will allow you to play this units in the game. But if ya are impatient ;) just like me there's already a crack out there for releasing the units. Try searching the downloads of FED2K to get it :)