if the insight and speculation on this board are accurate, it doesn't sound like the 1199 sl homologation special is going to be reducing engine capacity any.
i've always been in the i-want-a-ducati-v4 camp. rules shouldnt have to be played around with--they should be clean and simple. 1,000cc 2, 3, or 4 cylinders. 2 is obviously handicapped by physics in certain respects (isn't that why ducati abandoned tradition and doesnt run an l-twin in motogp?). i think it's time their superbikes moved on too.