Mel Gibson wrote and will direct “Apocalypto,” an action film which, sources say, is not religious in theme. The film begins production in October in Mexico for a summer 2006 release. Gibson will produce along with Icon partner Bruce Davey. Gibson will not star in “Apocalypto” and may not use a star for the film, which is set in an ancient civilization some 3,000 years ago. The Oscar winner has already begun pre-production; he is setting locations and has already begun casting.