"Warner Bros. Animation is saddened to learn of the passing of Ken Spears and we send our warmest thoughts to his loved ones. He was a true innovator in the industry whose gifts of humor and storytelling continue to delight audiences," Sam Register, President, Warner Bros. Animation and Cartoon Network Studios, said in a statement. Register added, "You cannot find a screen in the world that has not played a version of Scooby-Doo. We continue to be inspired by his work at Warner Bros. Animation and are honored to carry on the legacy of his beloved characters."