Peter Bagge is one of my favorite cartoonists, and his Fantagraphics series HATE ranks up there with my all time favorite comics. A few years ago, Marvel commissioned Bagge to produce the Megalomaniacal Spider-Man, which ended up being possibly the weirdest Spider-Man title ever printed. Sales were fair, and a follow-up Hulk comic was commissioned. Bagge spent months working on The Incorrigible Hulk, only to find Marvel suddenly had cold feet about putting it out, as if one offbeat comic could possibly damage the "integrity" of the Hulk character in any way. The story is finished, but remains unpublished. Marvel has published all kinds of crazy crap over the years, and there's virtually nothing in the inventory drawer that doesn't eventually see print, so why not this??
Dammit, Marvel, I want my INCORRIGIBLE HULK!
UPDATE: If you want to read The Incorrigible Hulk, leave a comment - even if it's as simple as "Yeah, me too!" or "Grunt! Hulk comic funny good now!"