It is such a pervasive theme in our country and culture, everywhere you look in the movies, on television, it makes me wonder if it is totally healthy or indicative of some of the other weird things that are going on.
I wouldn't read too much into it. Personally, the super hero movies were the defibrillator paddles for my movie-going experience. I'd hit children's movies with my daughter, but I rarely got excited about going to the theater unless it was a movie that really caught my eye. I enjoy the genre because it's purely entertaining and it takes my mind off my real world for a few hours.
I don't think it has anything to do with the current state of affairs. It's about money and striking while the iron is hot. There have been super heroes forever in comics, on tv and in the movies. It took awhile for studios to finally say, "We have a following and the potential for boatloads of money. Let's try doing this really well instead of having it be the campy versions that we're used to." Marvel's success is remarkable and commendable. I'm curious to see how they move forward without falling victim to over-saturation and super hero burnout.
They are probably wise to give the public a while to take a breath, but it's still a genre that has a sizable footprint and is remarkably good at reproducing a fan base from generation to generation.