premise: William George "Billy" Zane, Jr. (born February 24, 1966) is an American actor and producer. He is best known for playing Hughie in the thriller "Dead Calm" (1989), Kit Walker / The Phantom in the superhero film "The Phantom" (1996), Caledon Hockley in the epic romantic disaster film "Titanic" (1997), and for his television role as John Wheeler in the serial drama series "Twin Peaks".
hypothesis: The only superhero character that William George "Billy" Zane, Jr played was the Phantom, otherwise known as Kit Walker, in the superhero film "The Phantom."
reason: The statement did not say if he ever played any other superheroes besides the Phantom.