Ridley has said numerous times that the “Alien DNA” will become obvious by the end of the film, thus making a connection to the legendary film which redefined science fiction.
If you kook carefully at the EW stills you can see some very alien-esque set details. The still with the huge idol surrounded by many small totems is eerily similar to and alien brood chamber filled with eggs. And the idol itself is quite ominous. The fact that it appears to be humanoid raises a lot of questions.
Prometheus was already on my 2012 must see list. Ridley had me at “Noomi Rapace and Charlize Theron” but being a huge fan of the alien franchise (except of course Alien resurrection and those god awful AVP films) I would have anticipated this just because its related to Alien and Directed by Ridley Scott.