The battle between Sopranos star James Gandolfini and HBO is about to get uglier. According to reports, the cabler is expected to file a countersuit against the actor, claiming he would cost the network $100 million by failing to show up for work on the show's fifth season. "We are exposing the frivolous nature of [Gandolfini's] claims," says HBO attorney Bert Fields. "If he doesn't show up by March 24, he's going to owe a huge amount of money." Gandolfini sued HBO last week over a contract technicality. Some say the whole thing is nothing more than a negotiations ploy. And to that, I say: "Duh!"