Betting on adventure This summer, many movie people expect big things from 'Indiana Jones.' By John HornLos Angeles Times Staff Writer SHOWEST, the annual convention of movie theater owners, is held in Sin City, a town famous for creating thousands of losers -- and a handful of winners -- every minute. Against that backdrop, we decided the annual National Assn. of Theatre Owners gathering was the perfect place to stage our own game of chance. The rules were simple: With a reminder list of the summer's most prominent releases in hand, more than a dozen exhibitors, producers, studio executives, marketing experts -- and even a filmmaker -- were asked to handicap the May-August movies. All were told to pick the summer's biggest success, its most surprising sleeper hit and its largest bomb. Because many people interviewed were handicapping (and slamming) films, filmmakers and studios with whom they might have business dealings, everyone was allowed to comment anonymously -- you know, what happens in Vegas stays in Vegas. One more thing: Studio employees could not vote for their own movies. And though choices were all over the board, it was clear that attendees were bullish on Paramount's "Indiana Jones and the Kingdom of the Crystal Skull"
and far less excited about Marvel Studios and Universal's "The Incredible Hulk."