Grand Admiral Thrawn - Star Wars Rebels Season ThreeDisney XD and Lucasfilm have announced the premier date for the debut of the third season of Star Wars Rebels. September 24 will have a one hour episode that will introduce the long awaited Admiral Thrawn to the Star Wars canon. All of the main characters are returning for this season, and a few other fan favorites besides Thrawn will make appearances. It looks to be a very exciting time for the show!