How to make a blockbuster movie hit out of Dan Brown’s “The Da Vinci Code” and not offend Catholics? “Controlling that controversy will be the key for Columbia in protecting its investment. That’s why its team of PR experts are sending the message that it will be an enjoyable “popcorn” fiction. The filmmakers are distancing themselves from Dan Brown’s much-vaunted “research” into a private sect that has supposedly kept a 2,000-year-old secret that would undermine traditional Christianity.”