Possible Olympus FF dilemma....what will they do?

I think the most likely scenario is that these lenses never see the light of day. Next most likely is that these designs appear under someone else's brand name, for an existing FF system. If Olympus goes into FF with its own branded lenses I'm pretty sure it'll be because it also sells big-sensor cameras. My guess is that these would use the same lens mount as Sony models and could share some underlying technologies too. But overall, relatively unlikely.