The plot was simple and the movie scared the absolute pants off me. Of course it helped that I knew nothing about it!! Once you know any bit of information about this film it kind of spoils it.
Anyhow, I watched Eden Lake a month or so ago, and learnt that its director James Watkins next project was a sequel to the Descent.
I have no idea how they plan on pulling it off, but watching this trailer leads me to believe they are using the U.S ending as a starting point. (Yes, the film had multiple endings depending on which country you saw it in)
Anyways....see for yourself: