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For one, if the person can continue on the account satoshi started of with here in the forum, I believe that will be one proof even though maybe that could be hacked

and to me, I don't really see the need for Satoshi to reveal himself or herself cos the person could easily be a female as well, and yet we have all these men claiming to be satoshi. If (s)he did not reveal themself then why would they want to do so now? I really don't care but I give thanks to Satoshi for finding Bitcoin whoever (s)he is.
Satoshi's email was hacked, his account is locked and even if it wasn't, odds are that he wouldn't know his password anyways... Since his posts were migrated from a different platform to bitcointalk.org.
If he really wanted to prove he is satoshi, he can move funds from a couple of the earliest block's block reward, or he can sign a message... That would conclusively prove it.
Great, that means at the end of the day there must be a way that these guys can prove that they are the real satoshi which is all that is required so we don't want people coming up to claim to be satoshi if they cannot provide a single prove that they have access to any of what you have mentioned.