Rumours floating about a K1 Mk3. A lot of overdue updates in terms of AF etc, video and such like. 61MP Sony Sensor - quite plausible at this point - $2500-3000. Rumours do state 2 x CF Express Type B slots which is where I become a little dismissive; my Mk1 K1 has 2 SDXC slots - not even UHS-II while my Nikons have 1 x CFE Type B and 1 x SD UHS-II - so while a potential customer has to fork out for the new camera there is the additional expense of new cars (unlikely that the camera will be cross-compatible with XQD format as well).
So while it sounds great (and owning the Nikons means I have the CF Express cards) I will believe it when I see it. And I will buy it.