Concept Art For The New Republic Shipyard On Corellia From Ahsoka By Brett Northcutt

Asajj Ventress Concept Art (originally Sith Villain from Star Wars: Episode II: Attack of the Clones)

Star Wars: The Cone Wars Concept Art

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.

IG-1000 MagnaGuards were a specialized series of droid produced during the Clone Wars for use in the Seperatist army. They served as personal guards to General Greivous and were personally trained by him. They were commonly equipped with electrostaffs made of lightsaber resistant metal.

Source: The Art of Episode III - Revenge of the Sith (2005)

First Appearance: Boba Fett - A New Threat (2004)

Luke Skywalker costume concept art for Return of the Jedi by Nilo Rodis-Jamero (1981)

Star Wars: Revenge of the Sith | Mustafar Concept Art

Lothal Temple atrium interior illustration by Andre Kirk

The Art Of Star Wars Episode III: Revenge of the Sith  [NABOO]

Imperial Guard concept art by Ralph McQuarrie - Return of the Jedi (1983)

Concept art for Kamino by Erik Tiemens, Doug Chiang, Ryan Church and Edwin Natividad. ATTACK OF THE CLONES (2002).