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 last time that "Satoshi" was active in a forum was the Cypher Punk forums in the 80's. There was a debate back then about the privacy of those transactions, in which a lot of them are trying to attempt to solve an "unsolved problem".
They did struggled until Satoshi cracked the code after the stock market crash sometime in 2008. I just don't know if he's still alive or dead by now. Everyone here could create a fake "Satoshi Nakamoto" username here (like BSV's Craig Wright who failed to prove that he is Satoshi Nakamoto), so we may not know if that "real" Satoshi would actually come back and prove it to all of us.