I don't think so. If he had a plan to come back to this forum he might have never left it in first place. Satoshi might be a person or a team. But what if he isn't even alive now.
There are many people leaving the forum and later returning and it is nothing new, whether he is alive or not is another story but the moniker Satoshi is dead for a long time and all we have is the history of his teachings 
.What if he was too old and died due to some chronic disease after 2009. What if this was his last wish to create a decentralized currency which no one could control. We definitely have a lot of unanswered questions.
An old man using his brains to create something that no one had a solution, if he died after 2009 then who was online till 2010 . Satoshi created something unique and left that to the entire world to explore and do the necessary changes afterwards.