I am not sure, but this seems to be simply a matter of the Zeiss-Kyocera agreement about the Contax name reaching its expiry date. If so, then far less reason to expect Zeiss to act on this than if Zeiss had actively re-acquired the rights ... but no reason to rule it out either.
My guess is that Zeiss is not interested in having its own digital camera system, being comfortably adapted to other lens markets like cine lenses, which fit the Zeiss style of high quality, high prices, low volume, and manual focus only.