That would definitely make a headline, especially if he signs a message to prove he’s the real owner of the account. But honestly I doubt he’ll ever show up. With Bitcoin being this valuable now, if he’s still alive his holdings are already massive. That would only put his life in danger.
Most likely he’ll just choose to live a simple life, since he can always take a stash from his Bitcoin whenever he needs to spend something.
I don't think things will get serious and his life will be in danger if he reveals his identity.
We don't need to make things so scary because there are still a lot of billionaires and millionaires out there and they are living very well. Not every billionaire or rich person is always in danger, or there is no solution to that problem. Musk, Gate or Mark are still living normal lives with hundreds of billions of dollars in assets, and so is Satoshi. His life might get a little busier and more troublesome than it is now, but it wouldn't be life-threatening if he showed up.
But I agree with you and everyone else, the chances of him showing up are very low because it doesn't benefit him at all.