Christopher Reeve’s Superman costume is up for auction

Sotheby’s upcoming “Film Memorabilia” auction includes some killer pop culture items. A production used Iron Man helmet worn by Robert Downey, Jr., sunglasses worn by Bruce Lee, and a flamethrower prop from Aliens. A Darth Vader lightsaber hilt is available, but since it’s from the Obi-Wan Kenobi television show, it’s not the top item. The gimer stick u…