Now, here I have to disagree with you. Whether the story approves of it or not, what is Dark Knight Returns if not an argument that Batman as a concept doesn't work in the world as it stands at the time of writing? A grandiose, unstoppable, uncompromising man-mountain that recruits children into his war and ends up effectively executed by the government, he's envisioned and shown as an artifact of the past that just doesn't fit anymore, and the aftermath of that, starting with Year One, was redefining him so that he could. Miracleman similarly took the idea of the super-man to its own ending, with a perfected over-being and his pantheon gazing wistfully over a saved Earth that he's unwittingly frozen in amber, but that was in turn matched by the likes of Samaritan and the Superman of All-Star and Secret Identity, which worked towards justifying the conceit in light of that. The problem is, those weren't main Superman titles.
I don't think we can especially continue this - not the right thread - but this reminds me, I'd really recommend you check out Al Ewing's novel Gods of Manhattan. It's the second part of a trilogy - preceded by El Sombra and finished with Pax Omega, at set in a larger pulp/steampunk universe established by another writer - but it stands well on its own (though I'd absolutely recommend the other two chapters as well), and stars a reworking of the Superman/Doc Savage concept that I think you'd particularly enjoy, as it very precisely and interestingly defines his environment, cast, goals, capabilities, motivations and rationale for his actions in a way that's emotionally effective, well-thought through and doesn't render the archetype unrecognizable. It's not 1:1 How Superman Should Work, but I think you'd agree it's a fine template.