<< Continued from "Weekend Forecast""If it's Halloween, it must be Saw." Lionsgate is banking that moviegoers will remember that old adage this weekend, when the 2004 horror classic is re-released in to over 2,000 theaters.The original Saw opened to a surprising $18.3 million on this weekend 10 years ago, and spawned a franchise that ruled the next four Halloweens.