A trio of new releases propelled the box office to a record weekend, and DreamWorks Animation’s and Paramount Pictures’ Megamind led the way with $47.7 million, according to studio estimates. The $130 million CG-animated comedy starring Will Ferrell, Brad Pitt, and Tina Fey got off to a slightly underwhelming $12.5 million start on Friday. But the superhero flick skyrocketed 65 percent on Saturday as parents, starved for a family film to take their tots to, stormed the local multiplex.