BREAK OUT YOUR DARKSTEELFOIL HATS - THIS ONE'S ON THE FRINGE.
In Version 1.0, we saw the sea serpent of Limsa Lominsa (rumored then to be Thalaos, the sea serpent created by Llymlaen to fill the primordial dry with water) fiercely guarding the treasure at Seal Rock (one of the mysterious horns desired by the ascians). Likewise, we saw Midgardsormr (rumored then to be the guardian of Silvertear appointed by Althyk and Nymeia) fiercely guarding the concentration of aether at the center of the world's network, resting below the falls...
Then, revealed was Bahamut (thought by the Ishgardian theologian to [possibly] be considered a god to dragonkind) imprisoned in a great Allag machine (known as Dalamud in the modern age) in the skies. If we take a close look at the structure, we can see that Bahamut was pinned immobile at the enter by the "swords", these swords were then held in place by the spherical frame, likely distributing the force of his struggle from the swords to the frame evenly and locking the prison securely shut.
In Bahamut, we see a few clues that the Allag were somehow capable of controlling, perhaps even enslaving, dragons. If you haven't seen any footage from the Binding Coil, let's just say for now that Bahamut probably didn't forge that golden armor with his little T-Rex arms and that the lunar transmitter probably wasn't actually used to emulate a magick they were perfectly capable of using on their own in order to crash the machine they exiled to the sky themselves into their own territory.
I'm starting to become more and more convinced that The Twelve were simply great Allag figures. Perhaps "Midgardsormr" and "Thalaos" were enslaved by the Allag to protect areas they deemed important? Perhaps the war between Dravania and Eorzea is older than we think and truly goes back to the real, Allagan Halone? The farthest back we've seen the legends of the Twelve truly go are back to the Allagan Runestones on which their symbols were carved; but perhaps in this time they were not yet gods. Perhaps the Eorzeans crafted these myths later on ... after all, they considered Dalamud to be a celestial body placed in the heavens at the creation...
Puts a new spin on Mehphina's Loyal Hound... no?
EDIT: Now I'm all worked up over what the hell the horns were, again... Freaking horns...