Avatar Tops The 1 Billion Dollar Mark Twentieth Century Fox's "Avatar" reached a worldwide cume of $1.02 billion through Sunday, leading the most lucrative Christmas season in history. "Avatar" becomes the fourth highest grosser ever, behind James Cameron's "Titanic" ($1.8 billion), "The Lord of the Rings: The Return of the King" ($1.12 billion) and "Pirates of the Caribbean: Dead Man's Chest" ($1.07 billion). "Avatar" should soon eclipse the latter two pics. Over New Year's weekend, "Avatar" grossed an estimated $68.3 million from 3,461 runs at the domestic B.O. -- the best number ever for a film in its third weekend -- for a cume of $352.1 million in its 17th day in release. Overseas, the 3D sci-fi fantasy added $133.5 million for a foreign cume of $670.2 million in 21 days in release. Of "Avatar's" global total, $66.4 million has come from Imax theaters, a record for the large-format