I'm pretty sure that photo was taken as part of the hologram scene and not something that occurs after the events of the movie. I actually have that still saved from a while back. Think about it though, the engineers were wiped out at LV-223 2000 years ago. Ridley has stated that engineer tech changes as we go from the saucer-like craft at the beginning of Prometheus to the juggernaut ships at the end. So why wouldn't their suits change especially after 2000 years? Thats just silly. Also, why go back now? If the signal on LV-421 is a warning that there was an outbreak and to stay away, then why do the complete opposite and go anyway? Given the engineers went back to earth after the outbreak, i still dont see them returning to a site of extreme contamination and not turn off the warning signal after they got there. Especielly if there was some kind of civil war between the "faithful" engineers and the "rebels". I do agree that theres a creator though. Like a big Cthulu xeno god would be f**kin awesome!