the nearest they will be to humans if anything , is humanoid in form arms and legs and eyes etc, but thats as far as it will go, if everything that has been leaked comes to pass plot wise. Personally, i'm a bit suspect of these plot leaks of how the jockey looks inside 'the suit'. I think scott may have gone for something completely devoid of that and very very original we have never seen before. Bipedal? who knows, but all we know is those caves are massive so whatever it is, it needs space to move around. I'm loving the secrecy and ambiguity that surrounds this project, makes the anticipation for this movie so much higher.