So I’ve started to spend too much time theorizing again. I was thinking to maybe record a theory video, just to let loose. I have some ideas in mind, and here’s some talking points. Bear in mind that half of these are super outlandish and I’m being semi-devil’s advocate-y here.
* They’re not actually below Hyrule Castle. I think Monster Maze did a very good case for why the structure they’re finding Ganondorf in is in a faraway place rather than in the middle of Hyrule, but I’d like to elaborate. I think the ox is the main point here. It just looks like they’ve been traveling for a long, long time, perhaps days. Why bring all of that equipment on the ox, otherwise? It looked like camping equipment. I like the theory that they’ve been traveling underground for a long time, to find the long forgotten sealing chamber where Ganondorf resides. They wouldn't be camping for days just to go underneath the castle.
Here’s the broader theory: The villain in the story isn’t Ganondorf, but malice itself. Malice is a perpetual hellish evil substance who resides deep below Hyrule, stretched out over all regions, kind of like the Lifestream in FFVII. Ganondorf was originally a Gerudo with evil intent, so he took control of all malice. (Hence the Moblins and Bokoblins in a cloud of malice attacking as depicted on the mural in Teaser #3) When he was defeated, the Zonai imprisoned and sealed him. So when he gets unsealed as seen in Teaser #1, he once again gains control of malice, and it erupts all over the place, Hyrule Castle, Death Mountain, you name it. But I think Ganondorf himself is ascending, inside the abandoned structure that his chamber was in, I really got caught up in Zeltik’s idea that the main goal of the game will be up, not down. At the top of the sky, a sort of moving castle/fortress is moving across the sky where Ganondorf resides. That is what you will need to reach. You will be able to do this right after the start of the game, just like in BotW.
As for Zelda’s fate: She is falling down a shaft, into the underground stream of malice itself. Not killed, due to her divine powers, but trapped. And only by defeating the one in control of malice, Ganondorf, can Zelda be separated from the malice stream. As for Ganodorf himself, one might wonder what he will be up to. In BotW, he was perpetually locked inside Hyrule Castle with Zelda, but here, he will be of a more proactive role. The fortress will act as a new blood moon, continuously using dark magic to spawn enemies. The overworld layer of TotK will be more “hostile” this time around, with lots of malice-infested areas, and more enemies spawned from Ganondorf’s dark magic.
* There will be an alternate dimension. (AKA I think I solved the vials mystery) This is a real headache. What’s with the vials? Link has them on the boxart, all the way through Teaser #3, but they're completely absent in Teaser #2. As is the Master Sword, but Link has the messed up Master Sword in the Delay Teaser, but no vials.
I think the vials are a key component in the game. They’re not just a thing attached to the arm’s abilities, they’re the central plot item. Hence why I think Link will receive them at the very beginning. I think they will act as a magic supply for the arm. Every ability on the arm has a magic meter, and you can accumulate magic energy from enemies you defeat, Dark Souls-style, into a vial. When the arm’s ability is running out, Link will inject a vial into the arm to refill the ability. But the vials will also have a plot role, in that they will store the spiritual energy of the, presumably, tears that Link will collect from the main dungeons.
So, what’s up with them missing? I think the shot of Link opening the doors at the beginning of Teaser #3 is going to be the “cliffside” moment of the game, and that it will lead to the “Great Plateau” of TotK. And here, Link will get the vials. At this point, he also has the broken Master Sword. But every shot with him in Teaser #2 and the Delay Teaser has the vials missing. That is because I believe that there will be an alternative dimension that you enter when you pass through one of the Torii gates. You will enter the “past” of the heavenly kingdom, where it’s not yet torn apart, and this is what Aonuma meant with “the world expands beyond that”. In this dimension, Link will be stripped of the arm powers and the vials, (Note that across all teasers, it is only in his Champion’s Tunic/Hylian Tunic outfit that the hand is “used”) and the dimension, which is a segmented world and not an open one, consists of several Eventide Island-like separate quests. (The shot with the primitive axe in Teaser #3 is part of this) But here, link will have the Master Sword, because it is only in the alternate dimension where it can be reforged.
But, there’s also the fact that when Link descended in front of the Talus x Boko Camp fortress. It has the tunic, but not the vials. I believe that there will be enemies that has the capacity to lock and freeze the arm and vials, making them invisible and unusable. You can only unlock them by either waiting a while, or gather enough spirit energy.
* The mysterious figure in Teaser #3 is an alien. Okay, strap in: Many have speculated about this, and many believe that it’s a depiction of Goddess Hylia, but I think not. I think that the UFO idea from BotW’s pre-production will be part of TotK. It’s an idea rooted in the concept of gameplay in the sky, so I think it makes sense. I believe that the Zonai vanished one day and went to the heavens, but they got wiped out, and their kingdom torn apart, by invading aliens. I think that huge chunks of the kingdom got ripped apart and absorbed by UFO’s, and that the UFO’s will be the game’s main dungeons. And clearing them, will make the torn apart lands of the kingdom drop down and settle back into place, like in reverse. (and the animation will simulate a teardrop)
As for the mural itself, the woman depicted isn’t Zelda, but rather a queen of the Zonai. The alien descended, and pretended to be one of them, and made a pact with the queen, hence the cupped hand positions behind the logo in Teaser #3. The queen was later sacrificed, or killed, and the last thing the Zonai saw was the alien on a UFO, with the seven tears consisting to seven large, torn apart land masses. The reason that this was documented in a mural was that, before they went extinct, the Zonai wanted to chronicle these events.
I dunno.