Frank Miller's "Little Nemo in Slumberland" and "Little Orphan Annie." From this blog, via MeFi.

This Livejournal has scans of the origins of Superman villains, drawn in the style of Windsor McKay's Little Nemo in Slumberland. It's a little high-concept, but apparently these actually ran as part of a "Secret Files" issue in the 1990s, with the idea that these were the origins as told by Lex Luthor to his daughter Lena (who was later merged with Brainiac 13, but that's a whole other story).