It’s no secret that Olympus is seeking a way to merge their two Four Thirds and Micro Four Thirds system in one. And the United States Patent US8390727 filed back in June 2010 by Olympus may show us how they intend to achieve that goal. Basically the optical viewfinder part showed on Figure Number 1 (see image on top) includes the Prisma and Mirror. It can be attached and detached from the original Mirrorless body shown on Figure 2.
Combined the camera looks like that:
Of course, patents are no proof that this may become real. But it shows that Olympus is seeking for a solution and I cant wait until they will announce their new High End Camera by end of this year. Will they finally solve that tricky situation?