This is an official(!) Olympus press release (Source: Olympus UK).
“Olympus working on new body for top-pro lenses
Interviewed today, Akira Watenabe said that active development is under way. No other details yet. Immediate Release Olympus working on new body for top-pro lenses:
Akira Watenabe, manager of Olympus Imaging’s SLR planning department, confirmed today that the company is definitely working on a body to deliver the focusing performance expected by users of the Top Pro lens series like the ground breaking 90-250 f2.8 fixed aperture zoom (Editor: Click here to see). Watenabe has been delighted with the success of the OM-D which has pushed the boundaries of performance for system cameras but acknowledged that it did not deliver with the legacy high end lenses from the E-System. Whilst further information were not forthcoming, he was keen to emphasise that Olympus is actively developing a solution and will announce more details in due course.”
So there is really an E-7 with E-M5 sensor coming soon ;)