I am wondering that as well. How is the story and plot going to tiptoe around the fact that they just crashed on a planet full of hostile creatures? What is the resolution? Everyone dies? Everyone is saved by a third party? It is for reasons like this that makes me wonder what is really going on under the surface. Maybe in the film it won't seem like a twist, maybe the ending reveals something that was just overlooked from earlier in the film. But in the end, I don't really see where the plot can go other than flashbacks and seeking a new home to live in. That is the only resolution that I see.