Magic, We can't read your SO's mind, but we can only go on what you've told us and what we've experienced ourselves. He's telling you this stuff to keep you dangling from the string that keeps you tethered to him. Go back and -reread Ken's last posting to you. He told you what his gut was telling him from reading your posting and the other posters, as well as myself have told you as well. In fact, I believe I touched on this keeping you on a string yesterday in one of my postings to you as a possibility. They will use any excuse to keep their assets to themselves and not share them or want to divide them up equally.
Well, if he wants what you use to have, then that can be done after the mediation meeting and things are settled up. You need to ensure that you are well protected financially. Why raise this issue now that the date has been set? I can tell you why...he's hoping you'll change your mind, drop the subject and continue on being his worker bee.
He's mixed up a nice batch of Kool-Aid for you to drink. Focus on what is important right now...you and your financial future. Let's see how much he wants what you used to have after the mediation meeting.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.