Director of such recent horror films as The Descent and Doomsday, Neil Marshall is looking to bring a little terror to your favorite family theme park. Marshall is currently in the early stages of discussion with CBS Films to direct their new horror project, Hellfest. The plot of Hellfest follows a costumed killer who singles out unsuspecting theme park attendees to slaughter on Halloween night. The studio plans to start production by the summer of 2012, making this Marshall’s next movie project. If successful, there are hopes to turn the project into a franchise to fill the void that has been left by the Saw, Final Destination and (hopefully) Paranormal Activity series. Hit the jump for more.

CBS Films has acquired a horror script entitled Hellfest from William Penick and Chris Sey. The screenplay is set in a Halloween theme park and features a costumed killer who begins killing patrons while unsuspecting, non-murdered customers assume it’s part of the show (silly customers). Per Heat Vision, The Walking Dead executive producer Gale Anne Hurd will produce Hellfest under her Valhalla Entertainment label. Penick and Sey developed their script based upon an original concept from Valhalla’s Ben Roberts who will executive produce the film. The co-scribes previously penned Secrets in the Walls, a television horror title that aired on Lifetime.