Alien Evolution

Well I think we will see two transformations but ultimately from the same origins. I believe the little black nano bug is the secret to the Engineers technology. They use this to re-write DNA of species and this is what they were doing on Earth. The snake thing has perhaps been subjected to the same nano bug or is some sort of super virus or super species that has developed on the baron world. The Engineers experiment on it and it becomes deadly and wwipes out the Engineers. The snake thing then effects one of the humans and he / she transforms into a Xeno type thing. Just a theory.....

Well, i believe the dark "goo" is of Engineer origin, and it's called "poseritus". The crew member in question gets exposed, returns to Earth, and the-that profile picture, change it...

I think we`ll see something HUGE near the end