In a chat with MTV Sam Raimi talks about all the tales of the Dybbuk and maybe a future sequel for "The Possession": Raimi said, "There are so many tales of the original Dybbuk box that never made it to the screen in this version. It's really out there, that thing. People do have so many stories. Ghost House Pictures has gone ahead and purchased the rights to their stories to make into a film so [a sequel is] possible. But I think it will all depend on if Ole Bornedal was interested and if a very meaningful screenplay could be written from the remaining materials."
(Source: DreadCentral.com)