I'll try this one and superhero films in general, I don't necessarily believe this, but it's an interesting one to think about.
Iron Man, the first of the MCU films, appeared a few months before the financial crisis really hit in '08 and the rest of the films have been released in a world still grappling with the consequences of that crisis.
The crash ruined a huge number of people, resulted in worldwide austerity measures and a decline in living standards, shook people's confidence in a lot of things and the poor handling of the fallout birthed all sorts of issues and resentments in the mind of the public; they became more distrusting than ever of bankers and Wall St. and felt that the political class were more interested in them than the people and they couldn't understand the crash, it was too big and complicated and there was nothing they could do about it, so they started to turn to "strongmen", people who would swoop down and save them and beat back the people they thought responsible, hence an almost insatiable appetite for superhero films; big, dazzling, entertaining films where superhuman characters work together to battle a clear enemy and save the world.
There's a book I haven't read called From Caligari to Hitler which sets out the idea that the roots of what would arise in Germany in the 30s and 40s were visible on-screen in the films of the Weimar-era, perhaps the roots of Trump were right there on the screen the whole time. The inner desires of the public manifested on the screen before they even knew it was what they wanted.