It sounds like your relationship with the publisher has broken down. Has the publisher paid you? Have you provided what was agreed to be provided? If not, then you might have some problems. But if you have provided what was required and the issue is just in the future, then it is not such a simple answer....but you would be in a better legal position if this were the case.
Sorry, but it depends on the circumstances. Give me a call if you want to hash over things. My wife is an active writer and I have seen some of the difficulties of the business. Or you can wait to see if you actually get sued, then decide what to do. Or you can seek legal advice at a free resource -- http://www.utahbar.org/public/tuesday_night_bar.html
This answer or response should not be considered legal advice, and does not create an attorney-client relationship. If you have further questions, I would be glad to discuss your situation further. I can be reached at US - (801) 746-6300, or online at -- http://www.lewishansen.com/attorneys/robinson.html
Alot of the answer will depend on the contract. Who gwts editorial control? If you do, tell them the work is done. If they do, you will probably have to go along unless you can show they have breached the contract. It is time to hire a lawyer.
This is not legal advice. Even if it were, fee legal advice is worth what you pay for it. The facts of every case are different and should be addressed by a competent attorney who has all of the facts.