And since no announcements have been made by any of the companies involved in this theoretical camera/back combination, there's nothing that can be said in this thread that hasn't already been speculated, discussed, misconstrued, debated, and rehashed ad nauseum in the other two multi-page threads on this same subject. Shall we just cut and paste those threads here and get it over with?
Hasselblad has gone to a closed system.
Leaf & Sinar have the Hy6/Rollei platform, also closed to outside players.
Phase and Mamiya have something in the works but haven't released details yet.
Everything else is wishful thinking, rumor-mongering, and speculation at this point.