Baz Luhrmann is about to dive back into his long-aborning Joan of Arc movie. But before he does, he had to return to the Elvis well, and the King’s new and returning subjects are glad he did. “EPiC: Elvis Presley in Concert” opened exclusively in Imax theaters this weekend before going wider to slightly smaller screens on Friday. there was little doubt the audience for Presley is still there, or at least for an Elvis seen through the eyes of one of contemporary cinema’s biggest name-brand