February has been an underwhelming month for Hollywood studios at the box office, but Robert Rodriguez is confident that his new movie, "Alita: Battle Angel," will prove the doubters wrong. The director's dismissal of predictions that the film will flop may come from its behind-the-scenes power broker's history: James Cameron, director of the two highest-grossing and visually arresting films of all time — "Titanic" and "Avatar" — is an executive producer for the film.