I'm excited to see this film.
First off, it's based on true events in Dickens life which seem little known in reader circles. Here's a good article that, among other topics, goes into this relationship:
How does he come to be mine
Secondly, I was so impressed with Abi Morgan's writing on her original two-season series The Hour. I trust her with this material and I'm excited to see what she does with it.