Scooby-Doo 2: Monsters Unleashed more than doubled the gross of its nearest competitor, garnering an estimated opening weekend total of $30.7 million; that was the fifth largest March opening ever.  Nearly four out of five critics blasted Scooby-Doo 2, but critics have little influence over Scooby's youthful target audience.  Though it dominated this weekend's box office, the sequel earned only about 55% of the $54 million pulled in by the first live action Scooby-Doo feature, but that first film debuted in the more kid-flic friendly month of June in 2002.  All things considered, the franchise appears to be in good shape; only an unlikely precipitous drop-off next weekend could prevent a Scooby-Doo 3. 

The Coen Brothers' adaptation of the classic Alec Guinness comedy, The Ladykillers came in second place with an estimated $13 million.  Mel Gibson's amazing The Passion of the Christ slipped only 36% to an estimated $12.5 million and moved into thirteenth place all time with a total domestic gross of some $315 million.