From DSLR Magazine @Twitter (Spanish) via Mirrorless Rumors.
From Google Translation and Quoted:-
"For the K-mount SLR like, and probably the same flange distance. No viewer!"
"The new Pentax CSC will be somewhat smaller than Kr, and is not sure-win-at once a beauty pageant."
"The new CSC will use the mount Pentax "K" classical optics compatible with their current SLR. You do not have eye-level viewfinder."
So, just believe these or not, for a K-mount, ugly and not-so-small mirrorless camera body but without a viewfinder to come! :-o