So guesses so far are converging towards PHOTOFAIR St. Petersburg, in early October. And the Russians had the new firmware first too... Makes sense!
On the other hand, everyone seemed to be holding their breadth for early September, so maybe we're just forever hoping for the next possible date... Allright, I'll put my guess in. Assuming nothing comes tomorrow in Australia (thanks Franc), then I'd say new flagship APS-C in St. Petersburg, and new mirrorless full frame at CP+ in Yokohama next February.