Slipped into the night’s events, for those in need of unambiguously good news, was this: Variety has confirmed “Breaking Bad” creator Vince Gilligan is working on a “Breaking Bad” movie so secret that we’re only now learning it’s about to start shooting. Truly, all we have is this: According to The Albuquerque Journal — the city has played home to both “Breaking Bad” and “Better Call Saul” — the about-to-start production has a title: Greenbriar, whatever that means.