Jerry Bruckheimer has said that a screenplay for a fifth "Pirates" movie is already being written! It's not a total shock that Disney and Bruckheimer have a great deal of faith in "Pirates of the Caribbean: On Stranger Tides". Each "Pirates" movie has made over $300 million in the USA alone (and "Pirates of the Caribbean: Dead Man's Curse" made over $400 million!) Future "Pirates" movies are said to likely be stand alone movies starring Johnny Depp as Captain Jack Sparrow and not connected like the first three movies were.
"Pirates of the Caribbean: On Stranger Tides" is a stand alone movie starring Johnny Depp and Geoffrey Rush from the previous trilogy. It is unknown if any other cast members might return for a stand alone sequel, though it seems likely that Jack Sparrow would cross paths with some of his old acquaintances from time to time.
Johnny Depp really seems to enjoy playing the character (and I'm sure he will make a lot of money) so he will probably be game for more sequels. In the meantime, "Pirates of the Caribbean: On Stranger Tides" opens this summer and will be in 3D!
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