Theories on Dragon Training (Puts On Tinfoil Historically Inaccurate Viking Hat)

I went to see How To Train Your Dragon 2 yesterday, and holy cow, it was great! I'd seen the first one a few months ago at a friend's house, but Dad wanted to see the second one with me so we checked the first one out of the library and watched it Saturday night. I also used to be a big fan of the books when I was younger, and I got to go to a Cressida Cowell book signing once. That was fun. I got a plushie of Toothless. It looks like Movie Toothless, but it's about the size of Book Toothless. (Book Toothless is a lot smaller, if you didn't know that already.)

Me with my Toothless plushie outside the library. It was a few years ago, hence the long hair.

And the soundtrack--wow! I mean, I'm already a sucker for anything that sounds Irish/Scottish (Scotch?)/fiddle-y, and it was just so good! I just bought the soundtrack to the second movie and I'm listening to it as I type.

Having seen both movies in quick succession, I came away with a few conspiracy theories to explain minor plotpoints/plotholes that they didn't address.

**WARNING: MAJOR SPOILERS FOR BOTH HTTYD AND HTTYD2. YOU HAVE BEEN WARNED. DON'T SAY I DIDN'T TELL YOU SO.**

So in the first movie, it takes Hiccup quite a while to gain Toothless's trust, right? I mean, they can't even make eye contact the first time Toothless lets Hiccup touch him. But then nearish the end, when Hiccup and his classmates have to go help Stoic and the other adults beat the alpha, they train the other dragons pretty fast. It seems like a plotting gap, but I have an explanation!

See, the other dragons they train are already used to having humans around. I mean, yeah, the humans have mostly been fighting with them, but it didn't look like any serious injuries were done to the dragons. So the other dragons are already more trainable. Plus, Hiccup's already been covertly working with them for the past few weeks during his training.

On a similar note, I have a theory that when the alpha died in the first movie--the "Queen Bee" alpha--that made all the dragons under his/her/its control more susceptible to human friendship. Some kind of psychological bond obviously exists between the alpha and the other dragons, but when the alpha died with no new alpha to replace it, that bond would have snapped. Or maybe the Vikings were seen as a sort of alpha-substitute, since they were the ones who dispatched the old alpha. Either way, the satellite dragons are going to be much more open to human friendship, companionship, and training. Also I think Hiccup was probably out for at least a week or two between losing his leg and the end of the movie, so there was some time to adapt.

The one thing that I was wondering after I saw HTTYD2 was How did Drago control that alpha? I mean, Drago's alpha was HUGE. It could have just stepped on him or something. He was not that big a threat to it. But I figure that Drago probably put some serious effort into training the alpha--and by "serious effort" I mean that he refined some truly horrifying torture techniques for use on really big dragons. Making friends with it just isn't Drago's style. He must have found a way to make the alpha fear him, then figured out how to forge some kind of psychic link with it so that it knew and obeyed his commands. I'm not quite sure how he did this, but it can't have been fun for the dragon. I mean, did you see those chains around the alpha's tusks? Yikes.

So there you have it: my way-too-in-depth take on the HTTYD universe. What do you think about it? Any new theories?