Other mistake: After realising they can track the mother box, Batman says they have to go back to his base to use one of his satellites to track it, and they all do so. Which completely ignores the fact that Cyborg could easily access the satellite feed directly using his abilities and display it to the others on any nearby screen in Star Labs.
Continuity mistake: In one scene after Hutch is beaten up on the bus, he has no facial injuries. Then in the next scene, they are back.
Factual error: Let's go by the movie geography; our planet is a big matrioska. By diagrams shown, this Hollow Earth would be by the Earth's core, thousands of miles deep. They enter from a portal in Antarctica. And yet, Godzilla later in the movie burns a random hole in the ground in HK deep enough to reach it, roars through it and Kong hears it, and the ape easily climbs it to poke back to the surface. Even admitting you can do the magic "1,000 miles in 2 seconds" warp anywhere, the scale is ludicrous.
Factual error: The sisters run out of fuel for the helicopter, which is then shown slamming down on the ground and essentially destroying itself. All helicopters are capable of autorotating safely to the ground in the event the engine(s) quit. Of course, that would not have been as dramatic. (01:05:15)
Factual error: Lt. Harp is told by Capt. Leo that the Lieutenant has 56,000h of UAV flying time, That is ridiculous. Even seasoned pilots of the Military Airlift Command do not have that many hours. Drone pilots can fly up to 1,800 hours a year, and Harp hasn't been flying drones for 31 years straight.
Factual error: In the nighttime hostage rescue scene, the rescue helicopter has its right and green navigation lights on, which are designed to show other aircraft where it is and which direction it is heading. This of course would not be the case while staging a clandestine operation in hostile territory.
Continuity mistake: In the desert digging, the Nova's trunk is open, then shut. (01:42:00 - 01:45:00)
Revealing mistake: The "bridge" within the crime scene tape is obviously a prop. It should be a continuation of the road, but it is tilted to the left and is more vertical (around 45°). The bridge isn't even very high. When Byron and others go under the bridge to look at the dead girl, there is only a few feet above their heads (clearance under the bridge). (00:04:54)
Other mistake: When the assassin is trapped inside the airlock with Tiger, she chokes him, and he collapses. The assassin then begins to walk back to the door to the ship, but just as she is about to open the door, Tiger sneaks up behind her and opens the airlock. There is no way she wouldn't have heard Tiger approaching her. The space was very confined and would have heard his footsteps whilst walking up to her. (01:52:05)
Factual error: After the HEAVY rain and losing his supplies during the storm, Max (Royce's adolescent son) told his sister he needed to find two very dry pieces of wood to be able to make a fire. Everything in the woods would have been soaked, but Max quickly found two "very dry" logs and was able to make a friction fire (in record speed).
Continuity mistake: The way "H" was lying on the road after getting shot was different in the aerial view shown shortly thereafter. H's body motions after getting shot were awkward enough - falling backwards but somehow managing to twist his body so that he could land facing the culprits. His body ended up being at about a 45°angle to the road barricades, but was parallel in the aerial view. Also, the road barriers would have blocked his view of the shooter and the ability of the shooter to look into his eyes. (01:13:35 - 01:13:56)