Congratulations on the weight loss! So, how much more do you want to lose? Continue working on the weight loss. You will find that you feel better and have more energy.
About today, I agree w/LH19. Listen and validate...only validate if it is warranted. If he starts in on you w/criticism, just say I'm sorry you feel that way and just walk away. Whatever you do, try not to get into any heated discussions. Today is about him coming there and getting his stuff. Discussions about anything else, i.e., divorce, legal paperwork, etc., should be directed to your lawyer. That is what you are paying the lawyer to handle...representing you and you only.
Good luck today and remember...you are the prize. You can do this. Stay strong and positive and know that no matter what happens, you are doing to be okay.
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.