Director James Wan, who will be helming his very own superhero flick with the DC Extended Universe’s Aquaman, recently opened up to Collider and answered that very question, saying:
I think a big part of it is because we’re finally at the point where we can actually tell these larger than life stories and have the technology to make them work. That’s one factor, that we can create these whizz-bang visuals to go with the story and ultimately superheroes say a lot about the society we grow up in. Pretty much all the good superheroes have some kind of social commentary about why they are who they are. It teaches values and so it’s a very important thing. On one hand it works on a surface level because it’s super incredible to watch from a visual feast standpoint but on another level it works on a very human level it works on a very human, emotional level and I think it makes it fun for us. Let me pose you a question. Do you think people are having superhero fatigue?
Additionally, James Wan notes that there is something essentially moral about superhero movies. These heroes fight for what is right, we all inherently want the good guys to win and for villains to get their comeuppance.