Criticism of Superman as a character irritates me, even though I've never liked reading Superman comics that much. The one Superman story I did really like was Grant Morrison's All Star Superman, which I think is because he's one of the few writers that really understands the character. This is a quote from Morrison about how he sees Superman:
In the end, I saw Superman not as a superhero or even a science fiction character, but as a story of Everyman. We’re all Superman in our own adventures. We have our own Fortresses of Solitude we retreat to, with our own special collections of valued stuff, our own super–pets, our own “Bottle Cities” that we feel guilty for neglecting. We have our own peers and rivals and bizarre emotional or moral tangles to deal with.
I felt I’d really grasped the concept when I saw him as Everyman, or rather as the dreamself of Everyman. That “S” is the radiant emblem of divinity we reveal when we rip off our stuffy shirts, our social masks, our neuroses, our constructed selves, and become who we truly are.
Batman is obviously much cooler, but that’s because he’s a very energetic and adolescent fantasy character: a handsome billionaire playboy in black leather with a butler at this beck and call, better cars and gadgetry than James Bond, a horde of fetish femme fatales baying around his heels and no boss. That guy’s Superman day and night.
Superman grew up baling hay on a farm. He goes to work, for a boss, in an office. He pines after a hard–working gal. Only when he tears off his shirt does that heroic, ideal inner self come to life. That’s actually a much more adult fantasy than the one Batman’s peddling but it also makes Superman a little harder to sell. He’s much more of a working class superhero, which is why we ended the whole book with the image of a laboring Superman.
He’s Everyman operating on a sci–fi Paul Bunyan scale. His worries and emotional problems are the same as ours... except that when he falls out with his girlfriend, the world trembles.
And speaking of Grant Morrison, there was a JLA story he wrote several years ago that I think could be a good basis for a movie. Basically Batman keeps contingency plans in case he ever has to take out the other superheroes, and a villain steals and uses them (in the comic it was Ra's al Ghul, but in a movie it could be whoever).