This ^^^^^^^^^^^^
Thought it was good as a stand alone film but also kind of felt like an Alien film too, very much a prequel of a prequel and has some explaining to do but on the whole excellent although a little confusing in places. Wish there were more aliens like the one at the end, but that is for the next film im sure. As you say it will have to be directed by Ridley Scott or it could end up a bit of a mess.