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.