I have not seen or have solid evidence to prove what relationship, if any, Satoshi had with former forum admins and theymos in particular. We can read what theymos wrote, but that's probably it. Anybody can write whatever he or she wants. It's not necessarily the truth.
I find it also very faszinating that Satoshi apparently managed to disappear without traces and still remains anonymous. I respect that deeply. It was a very smart move, even when there are lots of people who can't grasp why.
Likely one good reason is this:
It's roughly, give or take a few hundrets of Bitcoins, the current balance of the so-called
Patoshi blocks, blocks that have been likely mined by Satoshi himself (see
http://satoshiblocks.info/). There are some attribution errors, but we're not nitpicking here now. But it's not only mined coins (all likely deliberately P2PK coinbase transactions), people are throwing a lot of dust and sometimes considerably more at those blocks particularly at the Genesis block. And the public address representation of those coinbase UTXOs is not what Satoshi used to mine to (now, that is nitpicking me, lol).
If Satoshi is attributed such a huge stash, that's a serious problem for him. There will be countless people who'd want to threaten him for just a piece of the cake, if not all. You can prove to have/own a private key, you can't prove the opposite. No-one would believe he may have deleted all roughly 22k private keys of "his" coinbases.
If he's still alive, he'd better remain anonymous and never spend any of his coins or hell will break loose over him.
I also don't believe Satoshi was a group of people. It's exponentially harder to keep a secret with a group of people and everybody of that group in line. Yes, all of the group would be equally threatened by the attributed fortune the same as a single person.
I wish Satoshi all the best and a peaceful life, whereever he is. Respect his choice to be and remain anonymous!