First thing: I do not claim that no one under their 20s reads comics anymore. Nor do I claim that no one who can't legally buy booze likes the Marvel and DC films. Neither do I claim that The Big Two don't offer anything to kids.
I do wonder if The Big Two have screwed up planting seeds for their future.
It really seems to have started in the early-1970s for Marvel, and the late-1970s for DC. Both companies began swerving toward older audiences with more complex tales, and messier, somewhat more "relatable" character interpretations (chasing Spider-Man's success as hard as they could).
For many of us older fans, that was all to the good. As we grew up, the comics grew up with us, and remained something we could stay with, rather than outgrow. The Big Two got this, and deliberately courted it.
And it worked. Particularly as comics got more expensive, and shifted to the LCS market, that older, longer-tenure, more fanatical customer made the businesses more profitable. However, it also made the business smaller.
Donner's Superman, Burton's Batman, Singer's X-Men, and Favreau/Feige's Iron Man all hit big, but a big part of them hitting big was the nostalgia factor. Comics were never a huge profit maker, and even their merch wasn't a patch on what Star Wars generated in its first couple of years. However, those loss leaders build brand recognition and fond memories that helped fuel all the film franchises that would follow.
What's being done to build that connection with tomorrow's grown ups?
Are there more hooks out there than I'm realizing? I mean I know the up-and-comings don't consume the same kind of entertainments as those of us Metamucil-Customers did back at their age. Are The Big Two farming the future so these wonderful characters don't go the way of Pecos Bill and The Shadow?
Or are we living the last, glorious Heyday of The American Costumed Superhero?