-Collect all pre-positioned studs in every level. Continue collecting them until the Jedi bar is full and flashing to get one superkit piece. After this is done in all levels the Tantive IV superkit model outside will become available.
-Note: This will also unlock the "?" door in Dexter's Diner. The "episode" behind the secret door that is opened after you collect all Minikits and the Superkit is in actuality only one level based on the opening scene from Episode IV: A New Hope. The "To Be Continued..." message at the end of the level hints at an upcoming sequel to Lego Star Wars, which would include the remaining episodes (IV, V, and VI).