I'm hardly a connoisseur of the Marvel universe(s?), but doesn't the notion that every character has an intriguing backstory sort of go against the basic tenets of that world?
Bingo!
That point had been bugging me as well, put I couldn't put my finger on it like you just did.
If Kyle from Tustin working the churro cart is actually the
Tustin Tornado (with many thanks to
@SSG for keeping tabs on Kyle's career) and his dorky manager checking his stock is actually
Captain Dockers, then the whole premise for the land seems to fall apart. Everyone isn't special, everyone isn't a hero, everyone doesn't have superpowers.
I can't imagine this concept was fleshed out beyond the lower executive levels in Anaheim. I can't imagine the Marvel folks bought off on this creatively, because as you say it goes against the basic tenets of the Marvel world.
But what I can imagine is that this
Everyone Is Super! concept was fleshed out by TDA's apparently clueless training department and their communications teams. The same people who put these silly videos together that claim that
"Every Role Is A Starring Role!" at Disneyland, because they are trying to hire youngsters who were constantly told they were very special, very talented, and that their entire generation was above average.
There's a hundred of these videos, covering nearly every mundane and average job at Disneyland.
So if
every Cast Member is a STAR!, and no one has an average job or merely a supporting role, then certainly everyone is a Superhero and is very, very special. Which makes all of that meaningless and pointless.