Perhaps the biggest surprise to fans of the Saw franchise came last year, not when Lionsgate announced they were making a new movie in the horror franchise but when they confirmed that comedian Chris Rock would star in the movie and had conceived of its story. One person this didn't surprise was Saw co-creator Leigh Whannell, who wrote the screenplay for the first three movies and even appeared in two of them. In a new interview, Whannell recounted a time back in 2015 (four years before Rock became attached to the project) where he met Rock at a party and the comedian spoke to him at length after finding out he was involved in the Saw franchise.