Brad over at Bloody Disgusting has quite the scoop for us all today! He confirms a Production Weekly report that a tenth Saw film is in development. While we don't know yet if Bousman will return from Spiral (trailer here), Brad has a bit of a bummer confirmation:
While this is the first to include [James Wan's production company] Atomic Monster in the production listing, I can assure you that Wan has not returned as an active participant in the SAW franchise.
Brad also points out that the success of Spiral: From the Book of Saw could affect all of this, so I guess we'll wait and see! Read more over at Bloody.