Even by the title alone, Predators promised a ton of Predators, in much the same way Aliens delivered a lot more aliens than the original film. We even got that great shot in the trailer of Adrien Brody as Royce, covered in dozens of the three-dot laser sightings that Predators use before blowing their subject away. It turned out only to be a bait-and-switch advertising moment -- a scene used to sell a moment that is drastically different in the actual film, where Royce is pinpointed by only one laser sight.
"A lot of my movies have trailer shots that I shoot just for the trailer," Predators producer Robert Rodriguez told MTV, "so that people haven't seen the movie already but they get the feeling of what it's supposed to represent." And what was that supposed to represent? According to the image, it represents a film with at least fifteen Predators, not the mere three that are on the hunt in the movie.
This isn't a case of cutting the scene from the final film or filming a scene explicitly for a trailer -- it's a deliberate, deceitful post-production fake-out to sell people on the film by promising them more Predators than ever before. I'm sorry, but there's a big difference between three and fifteen. I don't think anybody went to the movies to see that one single shot, but it's still a sneaky cheat, and when you reach that point in the movie, the glaring difference in the scene will take you out of the film just as surely as someone's cell phone going off. I'm sure that wasn't the filmmakers' intent.