That is exactly what I wanted to hear. He was entirely a background entity, a threat of immense proportions that drove the antagonists of multiple stories towards Holmes without directly interacting with him. Good to hear, I'm looking forward to seeing this movie now.
I am still disappointed some of the arbitrary changes to the stories, like the lack of prior association with Watson's fiance, since she was one of their early clients together, but overall the two characters are rather true to their roots, if a little more martial than in the books. I am glad that modern sensibilities allows for Holmes to be a drug addict, an important part of the character that has been overlooked in film for the last 70 years.