I think that quite a number of people who read the httyd books didn’t get a good hold of Book 11’s entire plot, but this book actually has maybe the most intricate plots (or so I think!), with a large portion of them hidden underwater, away from the reader’s direct view, and I have never read any analysis done about this part, so here are some Very Important things I found while doing my Book 11 analyses —
Excellinor planned for Snotlout to find Hiccup and trick him into coming to the war bunker, better if with the last Lost Thing — Toothless, and then force Hiccup to tell her the whereabouts of the Dragonmarkers’ Hideout in front of all the captured Dragonmarkers.
Excellinor sent Spydragons to catch one of Hiccup’s friends during the start of her plan, to force him to come, in case he didn’t trust Snotlout enough, or had realized that the latter was lying.
In fact, Hiccup knew that Snotlout was lying and was going to betray them, that this was part of Excellinor’s plan, possibly soon after they rescued Snotlout. So he chose to turn her plan on itself, by letting Toothless be taken away to the other Things’ hiding place, then using the Hogfly to track Toothless down, thus finding all the Things.
But of course Hiccup didn’t know of the torture that the witch had in mind for him… and he still had to come up with a plan to rescue Camicazi. During the “torture scene”, when Hiccup said “There is nothing you can do to me, that will make me change my mind”, he was actually hinting at the witch to “torture” Camicazi instead, while he knew that Windwalker underwater will rescue her. Then, during Camicazi’s “torture”, he pretended to give in, then pretended to not be able to talk or point, getting the witch to unchain him so he could escape.
It seems that Snotlout did think of stealing the Things and trying to become King when he agreed to play the part in Excellinor’s plan, but he may be looking for an opportunity to do so rather than having a complete plan. This, however, was completely destroyed after Excellinor “dispatched” him with her words in Chapter 10.
After releasing the Dragonmarkers (I’m not sure the exact reason why Snotlout did this, but I think he was not going to stick to the Alvinsmens’ side after what just happened, and releasing these people would cause some chaos, which might be useful for his later actions), Snotlout silently follows Hiccup to the ship on his Hurricane. He intended to defeat Hiccup in what would not be a fair swordfight (more on this later I promise), but I don’t think he wanted to actually kill Hiccup or take the things. Nor did he plan to reveal his pain and despair at having Turned his Back on himself — that was sort of out of control for him. (Like… you know what you get when you suppress certain emotions for too long? Not good) I’d say that he more or less knew/felt Hiccup’s attitude and feelings towards him, and to him this was confusing and irritating (this is Very Complicated, I will write more posts on this later), so he was going to scream it out at Hiccup.
When Snotlout flew out on Windwalker’s back towards the Alvinsmen, he not only knew that he was going to die (hinted in Book 11, stated/mentioned that he was “facing certain death” in Book 12), but also actually planned for himself to die, in order for his plan to work, to make the Alvinsmen believe that Hiccup had been killed, and therefore protect Hiccup until he reaches Tomorrow.
The plans of different characters are interlocked with each other, forming the plot of this book, and a huge portion of it is hidden under the surface, but visible if you look closely enough. This is truly the work of a great writer and storyteller.