Interesting challenge: lay out a plot line.
Lest you think too highly of me, I'm not that clever.
But just thinking of ideas for spinoffs, I think MW would've been fine devoting all of the novel to Fredo, maybe calling it "The Lost Don"? Negotiable.
Another idea for a spinoff novel: something on that wild and wacky Bocchicchio clan. Talk about dedication to a peripheral function!!!
Which reminds me: I'm wondering if ANYONE ever slipped up in negotiations and went ahead and whacked a Bocchicchio. I mean, has anyone ever tested the depth potential in their vengeance?
Also, if the tale was updated to late 90s or even post-2000, would we see the Negotiator playing pinochle or Pictionary? Maybe a couple of friendly rounds of Outburst before yanking Trivial Pursuit from the coat closet.