It wasn't all that long ago a brand-new Saw film appeared in cinemas every Halloween for seven consecutive years. In a move few saw coming, it quickly became one of the most strangely enduring horror franchises in history. And one of the most profitable. With a combined budget of just $77 million, the eight films of the Saw saga (you've probably forgotten 2017's tepid soft reboot Jigsaw) have collectively earned a staggering $976 million at the worldwide box office. You can see why Lionsgate refuses to let this franchise die. Despite...