Last week, after the advance screening of “Blade Runner 2049” I attended, one of the representatives of the publicity company that conducted the showing read a speech from director Denis Villeneuve asking critics not to reveal a number of things about the movie in our coverage. Some of the requests I probably would have adhered to in an advance review in any case, such as, “Do not reveal the fate of any of the characters.” Others were more finicky: a total blackout of the film’s first establishing scene, for example, and a request that if queried about a specific actor or character, we say, “We meet many striking characters over the course of the film, and she is one of them … I wouldn’t want to single anyone out; you’ll have to see the film for yourself to truly appreciate where everybody fits in.”