Charter is adding tons of HD channels as they do their digital conversions, and Michigan has been one of the earlier markets, starting in Saginaw. For some reason, while so many things are being added, NHL Network is not one that is. Since it's carried in SD through most of Charter's footprint, it's one of the more likely ones to come I think.
As Charter goes digital in Mt. Pleasant, they're getting 10 additional HD channels that Saginaw didn't get. I would figure they'll go back and get those channels to previously converted markets as new deals are made. The goal of what will ultimately be called Charter Spectrum is to have 200 HD channels. Nobody has got there yet, so there's another 15-20 HD channels that will be added somewhere. And I would think NHL Network, considering its already carried status, is at the top of that list.