I'm having a blast looking at all the "mockups" and speculations
Some people already stated that it looks like a big Optio. Considering the designer involved, the "K-" lettering on the front, and the shutter release style seems on that small leak, it's probably going to look modern with a retro twist.
The fact it doesn't feature an EVF makes me believe they maybe are going to release the EVF as a hot-shoe accessory, which in fact makes all the sense, since you could upgrade just the EVF instead of the whole body. I really doubt a company with photography DNA like PENTAX would release a K-mount camera limited to a back LCD only.