I don't think I've watched "King of the Hill" in its first-run slot since roughly 2001. But I'll always stop and watch it when I'm flipping channels, late night, whether it's on Cartoon Network or the local FOX affiliate.
But fresh Mike Judge stuff will still be around via ABC's "The Goode Family" (at least temporarily). Judge parlayed his "Tom Anderson voice" into KOTH, so now he's parlaying his "Mr. Van Driessen/Office Space" voice into another series. I'm hoping, someday, he can do a show based on his Boomhauer or Principal McVicker voices.
Year One is already in the works and will be out soon. Been awhile since I read Killing Joke, but I don't remember it being THAT short. Year One is only four regular sized comics, so with a bit of padding, it could be done.