There is a handful of movies that scared the hell out of me when I was young and John Carpenter's The Thing was one of them. In the movie, an alien life-form infiltrated an Antarctic research station and started to kill everyone. But what added to the paranoia of the staff was that the extraterrestrial organism was capable of imitating them. It was a brilliant movie and I was absolutely delighted to hear that a prequel is going to be released very soon, on 14 Oct 2011.
John Carpenter's movie started with an Alaskan Malamute that was trying to evade a Norwegian helicopter with an on-board sniper frantically trying to kill it. Matthijs van Heijningen Jr.'s The Thing takes place right before the first movie, following the exploits of the Norwegian and American scientists who originally discovered the alien.
I realize that it's going to be almost impossible to match or surpass Carpenter's movie but nonetheless I'm still very excited about it: