Samuel L. Jackson is joining John Cusack in 1408, based on the short story by Stephen King.... Sean William Scott is Gary the Tennis Coach in a comedy about a high-school janitor who trains a group of misfits.... Paul Giamatti will play Santa in Warner Bros.' Vince Vaughn-fronted comedy about the jolly one's black-sheep brother.... Brittany Snow and Kristin Cavalleri are sisters in the indie thriller Fingerprints.... Saturday Night Live's Andy Samberg will play an accident-prone, Evel Knievel-worshipping daredevil in the comedy Hot Rod.