The thing that I think is important to remember here is that "right" and "wrong" really are not important. You certainly can move back in, and I think he'd have to "let" you. But, would it really be any better? I am thinking he could make things pretty miserable for you and the kids. And calling the police for support might not work as well as it should, given that he is one of them.
Try to think more of the long term, than today and tomorrow. Make sure you document everything. (Maybe print out your posts here, since there was a lot of info in them.) Make sure that you are well represented, and let your lawyer work. If you don't your H will push you around, he is really acting the bully already. Don't just agree to anything.
For the time being, things won't be nice, but I think staying put, and letting the "legal" folks do their work is going to give you and the kids the best outcome for the long run.
