LOS ANGELES - "Everything is going to change now, isn't it?" Hermione Granger (Emma Watson) whispers to Harry Potter (Daniel Radcliffe) toward the end of Harry Potter and the Goblet of Fire." 

While Goblet of Fire, the fourth installment in the Warner Bros. juggernaut, has plenty of important textual changes - Triwizard challenges, resurrected Dark Lords and burgeoning sexuality just off the top - the shift behind the camera may have been just as big.