If he can 1) prove in court he is Satoshi with this and 2) then he has the 'proof' to make the Bitcoin Devs make a 'fork' to get all Satoshi's coin 3) Remember it is a 'Jury' Trial..
Ooh, scary stuff. Lol. A jury trial in some country means zero fack to the bitcoin end user. Remember, bitcoin is not a single software, bitcoin is an address, and a private key, and a database, good luck to any court in the world for accessing any private key for a certain number of addresses.
No one can "convince" anyone to do anything, this is not a problem for anyone, the one who could lose the most, is Satoshi, he seems not to care.