Didn't this movie seem like it owed a lot to the movie Retreat from a few years ago, right down to the "helicopters" heard outside the bunker and the protagonist's surprise at the end that the crazy guy was correct all along?
http://www.imdb.com/title/tt1410051/
I think it owes even more to a movie called Saving Grace about a woman who wakes up captive in an abandoned building , being held by a man who tells her that a cataclysmic attack took place in the city and he "saved" her by bringing her to safety.
There's even the element of a third person (a man) arriving part way through the movie.
While 10 Cloverfield Lane is a better movie in terms of acting and direction, I liked Saving Grace's approach to the central conflict more. Its main guy is a little more ambiguous in terms of whether he is for real or just totally crazy.
Here is a trailer for Saving Grace, though I recommend maybe only watching half of it as I think it gives away too many important moments: https://www.youtube.com/watch?v=z2xIElzX9UQ
I haven't heard of the films both of you are talking and I don't think they have either sooooooo, it owes nothing
shareI saw Saving Grace on a whim (as of a short while ago it was on Amazon Prime), about two years ago. I think that it is incredibly unseen, and I'd certainly never heard of it before clicking on it randomly while browsing Amazon one night. The movie mentioned by the OP, Retreat, is reasonably well-known. It stars a trio of well-known actors: Jamie Bell, Cillian Murphy, and Thandie Newton.
When I watched 10 Cloverfield Lane I was struck by the many, many similarities between the two stories: the character types, the plots, etc.
I'm not saying that the creative people behind 10 Cloverfield Lane plagiarized from Saving Grace. Sometimes stories get created by coincidence that have a lot of similarities. But if I were the person who wrote/directed Saving Grace a little part of me would probably be like, "Um . . . ?". There are literally scenes in both movies in which the female protagonist wakes up, injured and chained to a wall, and then the man holding her comes in and tells her that there has been an attack and that he has saved her by bringing her to this place. In both movies the woman is told that she cannot leave because the air is contaminated and it is not safe. In both movies the woman suspects that the attack may not be real and that the man is holding her captive for his own purposes.
And there are overlaps. For example: the man who directed 10 Cloverfield Lane and the guy who directed Retreat have both worked on the show Black Mirror. It's not hard to imagine that they are aware of each other's work.
It's not uncommon for movies to borrow really liberally from other movies, especially when the directors/writers think people won't spot it. There is a sequence in the movie Along Came a Spider that borrows really heavily from a scene from the movie High and Low.
Anyway, blah blah blah. I'd be most interested to know if the directors/writers of the movies themselves feel like their work was "borrowed" or if they think it's a coincidence.