This is the second trailer for The Meg (Warner Bros., 8.10) and they’re still only showing snips and shards of the beast. The trailer cutters are obviously reluctant to show too much. All I’m really getting from this are goofball vibes. Nine years ago the History Channel aired a show on Predator X, the aquatic superbeast that swam the seas and ate everything and everybody some 147 million years ago. 50 feet long, 99,000 pounds, foot-long teeth, four flippers, etc. If someone had made a film about this guy but in the vein of John SaylesAlligator, which is to say adult and knowing but with a slight wink, I’d have been happy.