LAS VEGAS (AP) -- Johnny Depp's tour guide on his "Pirates of the Caribbean" voyages is plotting the course for a fifth installment even before the fourth movie sails into theaters.

Producer Jerry Bruckheimer says he has a screenplay in the works for a fifth "Pirates" tale after May's "Pirates of the Caribbean: On Stranger Tides" comes out.

The original three "Pirates" blockbusters ended up as a trilogy continuing the same key characters and story line. Bruckheimer says "On Stranger Tides" and future "Pirates" flicks will be stand-alone stories continuing the adventures of Depp's woozy buccaneer Capt. Jack Sparrow.

Directed by Rob Marshall ("Chicago"), "On Stranger Tides" sends Jack on a quest for the fountain of youth. Bruckheimer and Marshall showed off footage Tuesday at CinemaCon, a Las Vegas convention of theater owners.