I always assumed a drop was a pretty likely possibility. The first movie had the novelty factor behind it (and since this apparently needs to be stressed, I specifically mean it was a novelty as far as movies based on superhero comics are concerned) and had an unprecedented cultural movement behind it. The media wouldn’t shut up about how “dangerous” the movie was, which I think got a number of people curious to see what the fuss was about.
Of course, this film isn’t out for another month, so it’s obviously too early to make judgements about how it’ll perform compared to its predecessor.