Filmmakers who would like to make the submarine action thriller “Hunter Killer,” attempting to extricate their film project from bankrupt Relativity Studios, accused the company and its founder Ryan Kavanaugh of operating a massive “sham,” which hedge funds continue to prop up to avoid booking the huge losses they have suffered as Relativity investors. The accusation was made Thursday in a scathing legal filing in U.S. Bankruptcy Court in New York by lawyers for producer Neal Moritz and the writers attempting to make the film, with Gerard Butler previously set to star as a submarine captain trying to save the...