This is bullshit. I don't wanna get hyped with this. It's obvious HBO tries to push their documentary with their click-bait title. It is their marketing strategy.
Its HBO, I am not surprised, they are probably going to print a lot of money from this that's why they do it, if money isn't coming out of this they won't give it a try in the first place, so expect some stupid fake news with zero proof that someone is the real Satoshi.
As far as I understand, this documentary will provide further evidence that the inventor of Bitcoin, known to the world under the pseudonym Satoshi Nakamoto, was Len Sassaman. This is a fairly plausible hypothesis.
Len Sassaman was indeed a very talented cryptographer. He is also known to have been a cypherpunk and a strong advocate of anonymity and privacy on the Internet. He committed suicide at the age of 31, 2 months after Satoshi Nakamoto published his last message (on the Bitcointalk forum).
Len Sassaman's personal computer was securely encrypted, and to this day no one has access to its contents (which explains the fact that the coins mined by Satoshi Nakamoto have not moved).
I will watch this documentary with interest.
The real Satoshi Nakamoto might not be the only one who is a smart cryptographer like you wrote, maybe Len Sassaman is also as smart as Nakamoto? Still there is no single proof that shows that he is Nakamoto, forget the part that Len died two months later after Nakamoto posted his last message.
HBO is obviously going to print cash out of lies if truly this is all they've got.