Seems like SAR has already picked up on the Canon rumours of a new sensor.
I do not know if he was joking, but he says that:

Not sure if it is just very quiet in the rumour website business at the moment, and they have all agreed to throw a little spice into the mix, but it looks like Photokina could be a very interesting show to attend.
http://www.sonyalpharumors.com/canon-to-start-a-new-sensor-tech-war-in-september/
I do not know if he was joking, but he says that:
All I can tell you know is that I heard about a 54 Full Frame Megapixel sensor from Sony (with 2460 focusing points (no joke!) and the focusing area covers 78% of the entire sensor). It was actually planed for a 2015 release but maybe Canon will make them change those plans…
Not sure if it is just very quiet in the rumour website business at the moment, and they have all agreed to throw a little spice into the mix, but it looks like Photokina could be a very interesting show to attend.
http://www.sonyalpharumors.com/canon-to-start-a-new-sensor-tech-war-in-september/