How about just rebranding and perhaps "modernising" the Hy6?
I.e.:
1: Make the camera's back rotate for landscape / portrait, rather than the back itself rotating.
2: At least three, preferably five widely spaced focus points in key positions within the frame, rather than bunched in the dead centre.
3: Battery in body that can also power the back or, if battery is installed in back, doubles the backs life (minus what it takes to power the body".)
4: Duel shutter system with option to keep focal plane shutter open to reduce shutter vibration in certain applications.
Oh yeah, and dreams are free...