It's the Age of Superheroes, among other burdensome identifiers of today.
(Such titles are the darlings of media and marketing, and are among the clusters and clutter of many clumsy, clunky ways of trying to figure out What On Earth is Happening Right Now, I realize, but it's better than the Age of Ignorance and Arrogance, as titles go -- GOP- and Trumpian-fandom and other related Fox-like IQ-slides aside.)
Perhaps superhero-dom is all the rage because all our problems seem so big, so unresolvable, so permanent, and so unyielding to our constant, hapless tinkering. Maybe it's just the mathematical result and automatic fun which comes from unchecked population increase where, thanks to sheer body-count growth, we still have the same basic percentage of lunatics, fools, morons, and village idiots, but -- Hey! -- where did all YOU yahoos come from? we say.
(Happened quickly, didn't it? Yeah, it always does, when you're not paying attention, otherwise it wouldn't be very sneaky or stealthy, so says one of my new superheroes, Major Oblivion -- a longtime chum of Captain Obvious and General Mayhem.)