I just hope part B has a character to talk about, like Crooks and racism for example. Sadly, if it is Curley or Slim, I can't see it being related to them as there isn't really any ideas within their characters in which you can compare to America at the time.
I suspect this is the reason they haven't come up yet.. maybe they won't because of this.
When did Candy last come up? There could be a part B related to him.