I think he or she will, something in my heart tells me they are still alive. I don`t think they will reveal their location or who they are, but I do think they will post on this forum in the next 5 years. It is only a matter of time before some big big rogue miners or bitcoin devs do something he or she do not like or see`s a problem with and they will have to come back and have a voice in the matter.
It will probably start by him or her saying something like this.
"Keep using the longest chain" or maybe "use this chain instead from now on"
I did a poll earlier a few months ago I think 19 out of 20 people said they would use whatever satoshi said.
The first thing we should settle first is he still alive or not there are theories that he is in prison but it's not yet verified, we will never know, we are waiting for something that's unlikely to happen if we cannot establish that he is still alive or any of his close relatives can prove that he is still alive and active, I love him to come back to us after the many ups and downs we encountered along the way.