Bitcoin works on a decentralized platform and doesn't need someone to step in like some kind of driver or pilot, Satoshi coming back wouldn't change anything unless it gets to the point of him selling his premined coins and all his other coins then for sure all stakeholders will have something to talk about with his return.

But with that Satoshi Nakamoto name being a pseudo name, I don't think he will be coming back neither does he have anything to prove because there is no benefit on a personal level, if anything coming back just puts him in harm's way with all these kidnappings going on...