Superman Returns director Bryan Singer talked to SCI FI Wire about producing the upcoming, feature-length documentary “Look Up in the Sky: The Amazing Story of Superman.”
“It was a very elaborate process,” Singer said in an interview. “It’s comprised of 50 or more interviews. It involved going to archives, researching and tracking down and optioning footage that people have never seen before of early incarnations of Superman.”
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Source: SCI FI Wire
