I imagine they already know. I cannot see how CAS only gives them an hour before they announce. My guess is that they were told Friday so they had the weekend to prep for the Monday or at the very least they'll be told tomorrow.
For me, I am not so worried about the ban. I have always been of the opinion that FFP was designed to keep the established powers powerful as I just cannot see how it is fair for the big clubs to load up on debt, yet external investment is declined. Therefore, my real interest is whether the reason City get away with it is due to FFP being illegal or some other reason.