>>105486771https://web.archive.org/web/20070930153829/http://www.wizarduniverse.com/magazine/wizard/000062004.cfm>“The idea [for Kingdom Come] was gestating while I was working on Marvels. I started working on the pitch—a long, 40-page handwritten outline—when I was working on the third issue of Marvels. I figured while I’m doing my grand opus of Marvel, I’ve got to do a grand opus about DC characters. Kingdom Come made me fall in love with superheroes, and DC’s heroes in particular, all the more. So once I was done with the series, I really only wanted to spend more time with the classic forms of these characters if that was possible. Turns out it was.
“Initially I pitched the story to James Robinson, because I figured he was a young wannabe Alan Moore. And I wanted this thing to be as much like a Watchmen-type project as possible. Mark [Waid] was the one who came most well recommended [by the DC editors] in terms of his love and knowledge of the history of DC heroes. And that’s how that marriage occurred.
“Cover one is the youth movement. There’s a sense of, how are these guys really different appearance-wise to villains? These characters are obviously
getting into much more of a dark tone. Long before he would become well known, Brian Azzarello posed as the character 666, kinda giving the proverbial finger with his giant metal arm [Center]. Plus, Jill Thompson posed for the Joker’s daughter [Center right].
If he was working on the idea of Kingdom Come while working on Marvels, it doesn't sound like he would've read Moore's Twilight pitch. he didn't work for DC till he did a few pages for Sandman Mystery Theatre, and I don't think he would've been able to read Moore's pitch at that time yet.