Strangely, they used a different image on the non-flash version of the site. It doesn't reveal any more detail, but it is lacking the large blotchy area near the grip which helps identify it as being in the 5D or similar series. I decoded the SFW on the Japanese site and the moon site to look for more info, but they were smart enough to not include any additional info.
Without measuring it, it looks somewhat like a 5D but also different. On the (old) 5D, the wheel is outside the 4th button, with this camera it's between the 3rd and 4th. To me it seems the viewfinder is larger and higher in proportion. Or the camera is smaller and less wide.
