They were actually first posted on the BOTB forum, by the same guy who posted all those mega-huge high-res studio shots of Batman on the white background.
The guy obviously has connections to the production, and that, combined with the fact that it looks like the same artist who did the Year One Designs (maybe the same guy worked on both projects?) AND the fact that the first design is very much approaching some of the concept art we did see for the Begins suit... well, I have a feeling these could be actual unseen production art from Begins - the stuff they didn't want to show us so it'd look like that came up with the final design right off the bat.