I am so sorry you are having to deal with this new twist. Do you think that your H is just trying to yank your chain...and see what he can get away with? That he's hoping you will fold and be the one to move?
This is something my H floated by me a year ago...declared that he would "move out for about 6 months while you figure out what you're going to do," (i.e. find somewhere to live) and then H would move back in for 'a year or so' to get the house ready to sell...When I laid down a firm boundary that I would stay in the house until it sold, H went ballistic...accused me of being totally selfish and not thinking about what was best for our kids...and then never moved out! (I still worry some about this scenario rearing its ugly head again sometime soon, as I think H is probably planning to make a move this summer...)
So stand strong on this boundary...don't let him bully you into taking actions you don't want!