That will not be so much a good news because part of what makes bitcoin what it currently his at the moment is the fact that satoshi is not known by both enthusiast and skeptics. if he or they are still alive and very much aware of what is going on around bitcoin, they ought to have known better that their revelation will do more harm than good to bitcoin. it will make headlines certainly but after then what next? will people trust them so much to think that they are any different from the regular guys? will fame not eat into them and politician starts to loby them so as to influence what becomes of bitcoin? will they not make statement about global politics and side with certain nation and it in a way affects bitcoins reputation? these and many reason are why i still subscribe to the fact that in terms of the revelation of satoshi's identity, it is better it remain the way it is now than allowing their identity go public.