vintagegeekculture:

According to early scripts, the original finale of “Return of the Jedi” would have been around the capital of the Empire, then named “Had Abbadon,” a planet that was one colossal city (an idea re-used in the prequels). The original threat was not one, but two death stars under construction in orbit around Had Abbadon, which also had a moon filled with life known as the Green Moon (which later on became Endor in the later drafts). Luke was taken by Vader to the Emperor’s palace and throne room on Had Abbadon, filled with lava. 

This was rewritten to streamline things and make the finale less ambitious, but Ralph McQuarrie did the art for the original concept.