Most of the time, the copy is not of a released movie, but of a movie everyone has heard about being made. When a movie is picked up, it gets press and another studio will often order up a copy based entirely on a one line description.
In order to save the Earth from a devastating collision with an asteroid (or comet, choose your poison) a team lands on the orbiting hunk of rock and detonates explosives to throw it off course.
Most of the time, the copy is not of a released movie, but of a movie everyone has heard about being made. When a movie is picked up, it gets press and another studio will often order up a copy based entirely on a one line description.
besides
ants < bugs life