The perception of the incident in question in all the first screaming capitals sounds MUCH more like this was a woman scorned who knew her husband (soon to be ex) was in there with another woman, and no way she sweetly and reasonably went to get her things back, (and then needed to use the bathroom and so begged to be let in and was denied) she went over there to kick that door down and break ugly on somebody.

Listen to your lawyer. Let them tell you what you need to say and what is important and what is not important. Remember, all this alleged past abuse by him is not going to amount to a hill of beans. The question that begs an answer is "Why did you not call the police, why did you not do something before when all this was going on?" and the obvious answer is that everything was all right, and it never happened (whether it did or not, you weren't going to make an issue of it) until you are getting a divorce, and now it's like "He held a gun on me and gave me a bloody nose last February, here he is, officer, arrest him!" Which of course, your attorney will explain to you does not matter at this point.

Yes, you of course have a chance. Right now neither you nor your husband sounds like great parenting material. Someone has to decide which of you gets to be the principal parent and who needs to be responsible for these children. You of course need to get the best legal representation and skip having temper tantrums and show your children some maturity from at least one adult in this mix. Fight intelligently in court, not standing on the steps screaming and kicking doors.