Just a quick word while I get clarification on this... the cover image is not meant to be publicly revealed yet, as they haven't posted a press release for it yet.
(I'm not sure why a copy was released on their site, but it sounds like it was probably only meant to be for the eyes of those who have access to that part of their boards)
When I find out more, I'll post it up.
(I was quite shocked to get a reply today after three years of sending them emails... but then was equally shocked to notice that the person replying was one of our founding 16 members of Ozformers)