Darth Vader on the Bridge of the First Super Star Destroyer, the Imperial March deafaning the audiance as the camera pulls out of the bridge revealing the SSD in all its glory and the FULL IMPERIAL FLEET surrounding the Executor (this time the music is going nuts) and as the music stops you hear a Vaders voice, Admiral, deploy the fleet.
and the whole fleet goes into hyperspace, the Empire begins and the film ends.