I completed the Endor mission as the Empire. I got Piett's SSD, I didn't bring Vader or Palpatine to the fight, and won. Afterwards I got a holo of Palpatine congratulating me and telling me to take the DS and destroy the rebellion and cut scene from Empire Strikes Back and fleet dispersing. When i come back to the game, Vader and Palpatine are gone. Is this supposed to happen? Can I earn them back since I won as the Empire at Endor?