Big Aliens/Skeletal Monstrosities

One of the things that most intrigues me about what we don't know is the vague references there have been to Aliens, not the xenomorph, but something that resmebles that aesthetic. You have the reference in the plot portion of this site: "The Aliens themselves are said to be much larger than the original "Xenomorphs" we are used to. However, their overall construction will be easily noticable to that of the original Alien canon." And there's also the reference in the Daily Star Interview with Katie Dickie about: "...how the crew of Prometheus are chased through the halls of their ship by "Skeletal Monstrosities"." I also recall from the leaked version of the teaser, which DOES have a few shots not used in the offical release, a very dark and very difficult to see shot where it looked as though a black xenomorph-like hand moving over the edge of a hypersleep chamber. Now...I'm not saying that it is a xenomorph, but...I wonder if this film will feature something else, something that shows us the kind of Dr. Frankensteins these SpaceJockeys are with their genetic manipulations that ultimately lead to the xenomorph we're used to. I just get the feeling there's something hiding in the shadows with this movie, showing itself in tiny bits of leaked info that is nothing like we expect or can even imagine at this point. What do you folks think?