Well at least it will be settled legally... That's the good news in the story.
This situation looks very complex and the lawyers will have a lot of reading and explaining to do. BTW, Lawyers are not very car savvy and it will be pretty difficult to make them understand everything....meaning a lot of time $$$.
It's very ridiculous though that you guys cannot come to terms! only you two know what's been done and what's right and wrong.
If this was my situation.... shit would get resolved right away, one way or another.