Okay. If you were two normal non-A people who fell out of love and wanted to divorce amicably, I could see negotiating something in writing about division of assets at a later date, but signing the divorce now.
However, that is not your situation. You are splitting from an A, who might decline/spend money/sell assets/etc... His scenario assumes money keeps flowing in and neither of you gets involved with another person who interferes in this. You think another woman is going to be okay with her new bf handing out money to his "former" wife? Women can be very manipulative in these situations. My ex's gf talked him into not returning things to me and not repaying money. She didn't want her gravy train interrupted. Get it?
Whatever you decide really needs to be done through attorneys and whatever you decide, do not give him control over your money or financial future. Take what you can and cut the cord.