I just got my copy in the mail. I'm annoyed that although it includes Batman #21-24, it doesn't include #0 which, as far as I understand, fit right between #21 and #22 and was intended as a prelude to Zero Year.
I could have sworn this was solicited at collecting #0 as well. Sigh. Is the only place to get #0 in that Zero Month hardcover (or else own the floppy)?