I'm not a fan of the Rathbone movies, so you don't have to worry ;) I've seen several, and they were... fine, but I wasn't stunned. I was mostly saddened by Watson's dumb-down-ification. I think you're right about the commercial thing - it's very true that they're attempting a crowd-pleaser with this movie, a "Holmes for the modern generation!" Which isn't going to be the Holmes I know and love, but I still think it'll be enjoyable.