A movie will be interesting if the main character is clearly told, but not much information can be obtained regarding Satoshi Nakamoto.
If we are forced to make a movie about Satoshi Nakamoto that does not attract the attention of many people, it is realistic to make a documentary.
Regarding the name Satoshi Nakamoto it looks like a Japanese name, but I doubt Satoshi Nakamoto comes from Japan. Because there is
not a single piece of evidence to suggest that Satoshi Nakamoto came from Japan, except the name used.
Making a movie without solid facts is just futile. You can't give a good narrative if the lead person himself has blurred personal history. So I don't think someone can ever make a movie for Satoshi. They can always use his persona in a movie but dedicating a movie for him is quite a challenge. So right now, even if someone has the funds to make it happen, they can't as they are not holding the facts about him, mostly are conspiracy theories and fake individuals admitting they are Satoshi.