Welcome back, Michael Keaton. Mr. Beetlejuice himself (last seen in 'The Other Guys' after too long an absence from the big screen) and Michelle Monaghan have signed on to star in 'Penthouse North,' a psychological thriller that Lionsgate is shopping around at the Toronto International Film festival. Directed by Joseph Ruben ('Dreamscape,' 'Sleeping With the Enemy'), the film centers on a photojournalist (Monaghan) haunted by a tragic event who retreats to an upscale New York penthouse, only to be confronted by a smooth but sadistic criminal (Keaton, in a part he can do oh-so-well) looking for a hidden fortune. It begins shooting in Ottawa, Canada, in November. [THR]