They are. Apparently it's from "New Earth" which is also Earth Zero, DC's main focus. The guy at the comic book store said there are at present, 10000 or so numbered earths, but most of them haven't been mentioned or shown.
I got the books here but if you'd like, come borrow mine. I mostly got the ones surrounding our earthquake and a series called 52. Alterna-you's not really around for most of those, but there was probably a row of comics in boxes devoted to Batman in various incarnations.
They were having a special too. Buy 100$ in giftcards and get 20$ free.