Saw it tonight on bluray, damn its bleak, well I thought it was bleak until I saw the deleted scenes and alternative endings, then its super bleak, it makes seven look like a carry on film.
Going to spoil the ending here since its been out a year, and other than me only 5 other people even cared to post in this thread, but Arnie turning out to be the bad guy was fairly obvious from the moment they found Sawyer nailed to the ceiling, and as for that, I only knew it was him from the fact he wasn't in any more scenes, because the bodies in this film are butchered more than the ones in predator, and I am no prude when it comes to violence, but if you can't even tell who is being killed it takes away some of the impact.
It was fairly obvious the woman was also a bad un, since she was crazy and coked up from the very first scene, the only real surprise was the first Rodney helping her, and that was only because his character was so bland up to that point, if he wasn't the token black guy on the team you wouldn't even remember he was there.
Michael from lost stole his thunder in every scene he was in.
I hear the original version was three hours long, but considering the deleted scenes only lasted about twenty minutes, I find that hard to believe.
And since the deleted scenes involve a incestuous rapist redneck who raped and murdered his own daughter, 1st Rodney groping his hostage, and Arnie killing all the cops, including Michael and the boss from Dollhouse you are better off not watching them.