The Descent 2
Sequel to the great British horror film from 2006 is due in December.
Don't read the plot description in the link if you want surprises, or haven't seen the first one.
http://en.wikipedia.org/wiki/The_Descent_2
What is evident, is that the original ending in the British one was just metaphorical, and not how the story actually ended. (People who have seen both the North American & British versions will know what I mean.)