Damn betting my btc asset its just a hearsay and possible viewers increase since crypto is going mainstream. Maybe HBO should invite some users here like theymos and others who might give them more clue instead.
Even if it's a marketing strategy, it's one that will certainly gain a lot of attention from people in the crypto community and among all Bitcoin enthusiast.
It's a documentary at the end of the day. They might try to compile some research and interviews they've done that sends a pointer to who is likely Satoshi based on some evidence and some likely footprint he's left behind.
We all know Satoshi can't stay anonymous all this while and just decides that the best way to reveal his true identity is through a documentary that's done by HBO. They might be good at making good movies but this isn't a fairytale or something like that. If he reveals his identity, he risk being attacked by the government and it will certainly have effect on Bitcoin. Satoshi's hidden identity is a core necessity that even helps to strengthen Bitcoin.