Hi Susan, it could have been made more clear as to whether any CE released between now and when the sale ends is eligible, but a mod on the BF forum has confirmed that it will be. Trouble is, that would have meant holding off on buying the new MCF for a few days, and I don't have that kind of intestinal fortitude.
The other CE that is supposed to be released before the sale ends is The Beast of Lycan Isle (developer is Silverback, who also brought us the Empress of the Deep games and Theater of the Absurd); we will see if it shows up.
Ana, I go into each MCF game thinking of it as a new experience rather than comparing it to others in the series; I agree with you that the developers try to offer something a bit different with each new release. It has certainly worked for me.