On Sunday Olympus released an official statement saying that a “Pro camera” is in the works. A 43rumors sent me this small info that may confirm that:
“This evening I took part in a survey about my last purchase of a DSLR/Mirrorless camera. I mentioned that it was from Olympus and in the next screen a list with all the actual system cameras made by Olympus came up. In this list where also mentioned E-6, E-650, E-PL4 and E-PM2. May be the author of that survey seams to know more about soon coming FT- and MFT cameras.”
The new PEN cameras are certainly coming so it sounds plausible that Olympus is thinking on an E-6 and E-650 release too. But for now trusted sources only confirmed the two PEN release now (and another OMD model months after Photokina).