http://www.mirrorlessrumors.com/new-pentax-q7-will-have-a-larger-11-7-inch-sensor/
The new Q-7 will be in Q-mount (of course) but will incorporate a larger 1/1.7" sensor, source of "leaked" information from the Japanese Digicame-info.com (Google-translated), which should be reliable enough for their past track records.
Btw, the Q-mount actually could accommodate a 1/1.7" sensor, yet with the possibility of the in-body SR, see my previous illustration below:-
Above: The Q-mount and possible sensor sizes; Original posted: http://ricehigh.blogspot.com/2011/06/how-large-sensor-that-pentax-could-put.html.
So, what will happen with the original Q lenses then? Well, suppose the image circle is large enough to cover, the 01 "standard prime" lens will become a 35mm standard wide (135 film wise) and the 02 "standard zoom" will become a 21-63mm lens, which I don't think the image circle is large enough for the wide side. Thus, that explains why we saw a new standard zoom patent from Pentax Ricoh before, with a 1/1.7" image circle, details here.
Related:-
How Large a Sensor that Pentax Could Put Into the Q?
New Ricoh Flagship P&S, or Yet Another GXR Module?
Sensor Sizes Re-visited, including the Latest Rumoured Nikon and Fuji Mirrorlesses