The studio estimate I posted on Saturday morning for Hellboy II‘s opening weekend was $35 million and change. This estimate was made with a presumption that Saturday grosses for Guillermo del Toro‘s film would dip a bit on Saturday, as sequels tend to do. This is precisely what happened. After taking in $13.7 million on Friday, Hellboy II dropped to $11.7 million yesterday. GDT and Universal are savoring their first-place victory while it lasts, knowing that next weekend’s box-office heat will be almost entirely about The Dark Knight and Mamma Mia!.