Total War: WARHAMMER Accidentally Revealed?

The Total War Center Forums have a post from a user named StormOfRazors who received an early copy of a book called The Art of Total War, which shows off the visuals created over the years for the strategy franchise (thanks IncGamers). This seems to accidentally spill some beans about the future of the series, as it contains references to an unannounced game called Total War: WARHAMMER, a concept which dovetails nicely with the collaboration between Creative Assembly and Games Workshop announced a bit over a year ago. The post includes pictures to help confirm the news, so if this is a hoax, it is particularly elaborate. The reference is brief, but clear. Here it is: "We're also experimenting with this in the mobile space, with Total War: KINGDOM, and taking the series to a fantasy setting with Total War: WARHAMMER."