I did some digging around and this is what I found out so far. Spoiler tag on this puppy is serious, so click at your own risk. I'm also avoiding the AoU film thread as this is the last spoiler I want to know about before the film's release.
My buddy who saw a very early cut of the entire movie a couple months back said that in the cut he saw, QS does die. I'm planning to ask another friend who saw a more recent cut of the film a couple weeks back if he saw a different take on QS's fate. This is a lot more early screenings to non-Marvel folks than previous Marvel movies, it could be that Marvel was focus group testing how to handle QS with different drafts of the film. I also have another friend who's attending the world premiere in mid-Apr and I plan on asking him what the final decision was with QS. Having said that, this is Marvel, if QS is popular enough after just 1 appearance, they'll find a way to bring him back.