Welcome Back, Travolta

*Developing: John Travolta's oh-so-hot again since making Pulp Fiction (it hasn't even opened yet). Next, he'll do Elmore Leonard's Get Shorty, playing a loan shark who goes to Hollywood to collect from a producer, only to end up in a movie about his life. *Shooting: Jon Bon Jovi got an Oscar nod for Best Song (Young Guns II's ''Blaze of Glory''). Will he win one for acting? The rocker's making his feature debut in Moonlight and Valentino as a housepainter who woos Elizabeth Perkins. Whoopi Goldberg and Kathleen Turner also star. Ellen Simon, daughter of Neil, wrote the screenplay. *Also Shooting: Under Siege II: Dark Territory got under way in Denver. This one puts Steven Seagal on a train hijacked by Gary Busey, who's out to sell military secrets. It opens next year.