Ticket presales for “This Is It,” the concert documentary from the late Michael Jackson, are moving briskly, according to entertainment trade publication Variety. Presales at the Los Angeles theaters that will first show the movie, and on Web sites such as Fandango.com and MovieTickets.com, have been selling out. The same is true in other countries around the world, such as England, France, Japan and Germany. Tickets went on sale September 27, and the film will debut on October 27.