Hmmm. I'm working on Dorri/Drysalt connection theories. I think there are five realistic possibilities. In rough order of likelihood:
#1. The one we've been assuming. Drysalt is a hidden mastermind, and Dorri has, relatively recently, made a deal with him for some reason. The two most likely points in time are when he needed something for Folkmarr's condition, and when he recently began to worry about Corpsemaker having him replaced. This is very plausible.
#2. Dorri has been coopted by Drysalt for much longer than that. He came to the Hading shortly after Drysalt's rampage...Drysalt could have contacted him shortly thereafter and offered him wealth and power for service. This seems unlikely to me but it's far from impossible if both of them are playing the long game.
#3. Drysalt is not a mastermind and never was. He had a master once...what if, after coming to the Hading, Dorri found a masterless Troll and somehow assumed the role of master over them? In this scenario, Drysalt is dangerous enough in a straight fight, but a red herring otherwise. Dorri is behind everything, simply using Drysalt as a tool. I don't think it's this one, but it'd be a hell of a twist if it was, which makes it interesting ton theorize on.
#4. Dorri is actually Drysalt in a person-suit. Presumably having been replaced after the birth of Folkmarr as neither he nor Framarr seem inhuman. This seems like a low probability outcome, but we can't rule it out with the information we currently have.
#5. Drysalt is actually Dorri in a troll-suit. The original Drysalt is long dead. Dorri has assumed the identity to carry out his less legitimate schemes on the down low. Not technically impossible, but pretty unlikely, I think, due to motivation...why do this? And why with such a recognizable alias?
But yeah, so, I think it's #1, but #2 and #3 are also pretty valid, and #4 and #5, while much less likely, aren't actually impossible. Can anyone think of other valid scenarios that aren't some subvariety of those? There's technically a possibility that Dorri is possessed and Drysalt's puppet, but I think that's even more unlikely than any of these scenarios.