It turns out there's already a Spawn animated movie that's essentially finished, starring Keith David and Mark Hamill, and it's been sitting in a box waiting for the right moment. For fans of HBO's Spawn animated series, that's a pretty wild revelation. Keith David returned as Spawn and Mark Hamill voices Detective Twitch Williams, taking over the role that was originally performed by Michael McShane in the HBO series. Knowing there's a feature-length continuation sitting on a shelf with Keith David and Mark Hamill already having recorded their performances is almost surreal. Considering how beloved the HBO series remains, it would be a shame if this animated movie stayed locked away forever.