Created exclusively for Star Wars Celebration Japan, which was held at the Makuhari-Messe Convention Center near Tokyo from July 19-21, 2008. Officially licensed by Lucasfilm, the print was sold directly by the artist at his booth as part of the Celebration art show at the event.
From Star Wars.com:
"Every Star Wars character who has ever picked up a lightsaber and stayed on the good side of the Force (or at least started there) is here. Looking at this lineup of noble and powerful warriors, it's a wonder that the Emperor could ever take power."