‘Red Lights’ actress also updates MTV News on ‘Avatar’ sequel status. By Josh Wigler, with reporting by Josh Horowitz Sigourney Weaver at Sundance 2012 Photo: Getty Images PARK CITY, Utah — Even at the Sundance Film Festival , genre icon Sigourney Weaver just can’t stay away from the supernatural. The actress has a lead role in director Rodrigo Cort
