Corrected entry: Compare the predators ship and crew from the end of AVP and start of AVP: Requiem. The end of the first movie shows the huge ship on the ice with a huge amount of predators. The size of the ship and crew seams to have been downsized in the beginning of the second movie.
Corrected entry: Predators are supposed to be the best, smartest hunters in the universe. So why did this predator wait to get on the crashed ship before arming himself to war? Ninja Stars, that crazy blue-acid stuff, even his shoulder lasers were taken from the wrecked ship. How come in his home planet or in his ship he did not have access to those weapons and risked running around almost unarmed when he knew there was a very dangerous Alien-Predator on the loose? This is not a character mistake, because it was stated in the last 3 Predator movies that those are serious hunters and do not risk themselves so stupidly.
Corrected entry: (SPOILER) The movie starts showing a very small city - small enough for the sheriff to know everyone by name, even being able to spend the morning waiting for some guy who was coming on a bus. As the movie evolves, the city turns into a much larger town, with things like: a power plant, a major hospital, with 10+ new-born babies (for a 5.476 population - as stated on the trailer - a very high birth rate), a lot of preagnent girls, State Troops only a few miles away, and so on. Also the bomb that was thrown on the city had a power of 200 kilotons (almost 20 times Hiroshima, which killed 250.000+ people), and even that enormous amount of power was not enough to destroy the entire city, as we could see from the General's map (only the central region would be directly destroyed by the bomb. The marginal areas would be hit by heat blast and debri blast). A small city that suddenly became very large or a small plot hole that suddenly became very large?
Corrected entry: As the tank-like army vehicle is going to the city's center, we can see that some people are still inside the traffic-jammed cars on the streets. Seeing as there are no smashed windows and no blood stains, we can assume that they were not killed by Aliens. So, what the hell are these people still doing in their cars? No way they think they are protected, and it does not seems like that traffic is ever going to move again.