At this point in time, it is no longer necessary for Satoshi to reveal himself or their selves, for several reasons, and one of this reasons is that Satoshi doing this now will steer up another controversy through out the cryptocurrency space and this controversy might end up having a negative impact on the general cryptocurrency market.
Another thing is that, Satoshi revealing himself now might make him an easy target for the government who are against bitcoin, and some other bitcoin haters, they might believe that since he wrote the code that brought about bitcoin, he has the ability to write another code that might destroy it, so it is better to for Satoshi to just be where ever he is or they are and enjoy his/their money with his/their family.