I think If Satoshi reveals himself, their will be no changes to bitcoin, except he start selling his Bitcoins (1 Million bitcoins) that will just
make bitcoin have no value, it will shut from current price 900$ to .9$ so I think its a good point for Bitcoin that Satoshi is now hidden in some where

first of all the 1 million is a complete estimate and it may actually be a lot less than that. also you do realize that since 2008 there have been 15.01 million more bitcoins mined making it a total of 16.01 million. in other words even 1 million
BTC is 1/16th of the total number of coins currently available.
i am not denying the effect that a possible movement of those coins may have but it certainly wound't kill bitcoin by making its price drop 99.9% (based on prices you said)