Originally posted by ExecuteR
so ep3 ends on tantive IV , not vader, tarkin and sidious seeing the death star being built
Not necessarily. He said the last lines of dialogue are from Threepio aboard the Tantive IV. However, every Star Wars movie ends with a scene with only music, no dialogue. The ceremony in IV, watching the Falcon fly off in V, the ewok party in VI, the parade in I, and the wedding in II.
So, Threepio could give his last line and then the music begins. Then maybe a long shot of Ben delivering Luke and walking off into the desert followed by the shot on the Star Destroyer bridge, all accompanyed by only the music. Roll credits.