I was thinking the same thing. An initial hesitance to associating with the Unholy Trinity is quickly dropped, which leads to a Satanic baptism and then the ball. More interesting still is Bulgakov making Woland's counterpart God, rather than Gabriel. I need to read Faust, and a couple of other things, before I reread M&M.

EDIT: Since I still have a minute or two I'd like to add that, while God and Woland seem to have methods which are antagonistic, their purpose is not, or at least not completely.