Other mistake: As the camera precedes He-Man, the tire tracks of the camera vehicle can be seen over his right shoulder.
Continuity mistake: As He-Man ducks from a shot by the centurion, his sword and harness fall completely off. In the stairwell, it's back in place.
Other mistake: As the troops come through the door to our world, assuming the are on the street between the buildings and the shot is done outside, the words on the drug store windows they pass are reversed.
Revealing mistake: As Evil-lyn sends a signal, one of the troops behind her gets on the transport. As he passes the railing, it and the wall wobble badly, showing a very cheaply made prop.