It has been years since we have been in touch, so I don't know if you remember me, but I used to represent MJ. I am so saddened by the news of his passing. I saw the thread about demos and unreleased music. I would be glad to give you any advice I can on copyright and protecting his music and legacy. Hopefully no one will try to take advantage, but music can be a pretty unsavory business.
Feel free to contact me any time.
It is hard to imagine the world without such a talented and funny force of nature.
I hope the memories and music bring all his family and friends some measure of peace.