Slow mo trailer 2nd scene

Hola,long time fan of all things Alien (Yes ,even 3 and resurrection,so no minority persecution please ;P ) and frequent lurker here. Decided to post after watching the slow motion trailer and a couple of things popped into my head. The second shot in the trailer shows a craft entering a planets atmosphere, now i've always hoped the bulk of the story wouldnt take place on LV-426 and thankfully it isnt. But do we know for sure the aforementioned shot is the Prometheus descending upon LV -223? If you look at it the planet appears quite mountainous (is that a word ?) and stormy compared to the descent to LV-223. My rambling point being could the shot be an engineers ship descending to LV-426? Also ,and obviously purely speculation,we know Vickers has a personal reason to be on the mission,maybe her father or relation was on a previous mission as per the Heliades speculation?? Thanks for persevering :)