I do not know this for certain, but judging by similar releases within some period, it appears there are at least three major studios. When one releases a big f

I do not know this for certain, but judging by similar releases within some period, it appears there are at least three major studios. When one releases a big film, at least one of the other large studios releases a very similar film. [1] One pair I recall is The Cave (2005) and The Descent (2005). These copies are not sharing actual source shots with each other, but I would guess there is some "studio espionage; one studio discovers what the other is doing and rushes to produce a similar film to be released within a few months of the other. [1] https://en.wikipedia.org/wiki/Twin_films https://en.wikipedia.org/wiki/Twin_films