Since I have received my Z7 I am anxious to process RAWs. I have made an inquiry on RAW support to my contacts at Phase One and will let you know what I hear.
Probably that they do not give details or release dates of forthcoming products.
Maybe for you, though under an NDA, but not for the general public, as such.
Of course, Phase One could change their policy as they did with supporting a medium format camera with the Fujifilm camera.