Why change the status quo of your relationship with him now? I'm sure there have been other important things that have taken place in your daughter's life through the years, and he has never expressed any interest to be involved? And you've never contacted him along the way.
I would just let the courts do their job - don't make it out to be anything more than what it is at this point - a formality. She already has a daddy that has raised her.
Danielle, my situation is different from your in many ways, but in others it is similiar. My DD is adopted, my DH and I adopted her as an infant. She came to us thru an agency. I prepared all the paperwork for her adoption and we brought it to court ourselves. We have no idea who her birth parents are. My DD is 20 yrs. old, when she was growing up we told her what info we had, when she approached 18 she mentioned she might be interested in finding her birthmother. I gave her the address of the agency and told her we would back her on anything she wants to do. I believe her birthmother tried her best, just by giving birth to her and putting faith in God that she would be given to a family that would love her forever. I do not hold the same affection for her birthfather. Yet I never said as much to her. I believe a father is more than a sperm contribution. Her father and I love that girl to death, as we do her brothers.
I have 2 BIL's (same sister) both not worth squat, never worried about the children they brought into this world. IF the children ate, it wasn't because of them. Your ex may be her birth father, but that man is no DADDY. I would keep every thing thru lawyers and the court. He hasn't put himself out for your DD, keep it very formal.
This is just my feeling about the matter, I wish you the very best of luck in your situation.
God bless. Alice.