You can set aside those hints that Baz Luhrmann might be retiring. The “Elvis” director is back in business with Warner Bros. Pictures and has signed a first look deal with the studio after the box office and awards success of his musical biopic on The King. Luhrmann’s “Elvis” scored eight Oscar nominations this week, including Best Picture, and the film is a box office hit and among the highest grossing of this year’s crop of Best Picture nominees, having made $287.3 million worldwide.