We never actually saw the destruction of the Death Star in Star Tours. They launched the proton torpedoes and then immediately jumped to hyperspace. Since this was the third time 'round, you'd think the Empire learned their lesson, and perhaps that exhaust port was a dud to distract the Rebels. The real question is not if the Death Star III is still around, but where they are hiding it and when it will be unleashed upon the Galaxy???
DUN DUN DUNNNNNNN!!!