1. Pretty sure Jim said that Marcone, and Hendricks were in the military together. Macfinn served in Vietnam. Could there be any connection there?
2. The Curse that Macfinn has is supposed to pass down his line until the End of Days. Those days aren't here yet in the story so it stands to reason that someone, somewhere is now Cursed. If it's someone from the books it means they have been keeping it secret. Who could it be? I'm leaning towards Hendricks (Mackfinn was a huge man, just like Hendricks). Also he's been somewhat absent in the books, and hasn't really been around Marcone in recent books I don't think.
3. I'm still in the middle of the book so this might be answered later but WHO destroyed the Macfinn's Circle? I'm guessing that Cowl is behind it. I'm thinking he's behind Victor Sells from Storm Front, he supplied the Wolf belts, and broke the Circle in Fool Moon, he supplied Nemesis to Leah in Grave Peril.
4. Is this Werewolf curse tied to Fenrir, the Wolf destined to kill Odin?
Here is something else that comes to mind. Nemesis to Leah is an obvious thing, but why Victor Sells, the broken Circle, and Wolf Belts? Were these things nothing more than a distraction? Were other things going on in Chicago while Harry was running around trying to put out these fires? I don't see what Cowl's end game was if he really is behind Victor, the Wolf Belts, and the Broken Circle.