I'd say the biggest problem with this prequel idea, or any prequel idea, is complete lack of suspense. We know that they all will die, and at the end of the picture, two will survive to jump in the chopper and run after the "dog."
Ron Moore is a great writer, but I don't see how this could be interesting enough to warrant another movie.
That all being said, I'm still going to be in line opening weekend. It's the THING!