Im in the same boat myself, I can't look away lol.
When Prometheus hit I had been away from the franchise and fandom for a long time, so my first introduction was the trailer. In the end it didn't matter because the trailer showed 90% of the good parts of the movie. I remember clearly thinking the trailer was amazing and was surprised how much they held back and didn't show. I was pretty surprised after watching the movie, I was thinking "I guess the trailer didnt hold back at all really".