Prefiguration and plot...

[u]Ok. Some more guesswork:[/u] 1.) The shape of the human space helmet is the defining shape of the Xeno's head. The Xeno is a bio-mechanical fusion of one of the crew and it's suit and some other ingredient. 3.) The Prometheus ship and captain are ultimately sacrificed to stop the "spinner" from reaching earth. The shot of the face of the captain in the trailer is the moment this happens. 4.) The spinner crashing and the crew running from it as it lands is the subsequent scene. The scene with Charlize getting into the escape pod is moments before the scene where the pod is ejected in the new trailer. 5.) Where did that "trunk" on the "pre-xeno's" head come from? It looks awfully close to those space suits behind Noomi, so that may be third ingredient? (reminds me of a movie called "the fly" from the 80's with Jeff Goldblum.) Just spilling out my thoughts for the trailer of the trailer .... :)