The Divine Beasts were built by the Ancient Sheikah tribe 100,00 years prior to the events of BotW. If you don't know, the Divine Beasts from BotW (Breath of the Wild) are used as weapons to assist the current reincarnation of the Triforce of Courage, Link. Remember how the passage I shared with you said Divine Beast to describe the Hero of Time's spirit form? This could be related to the Divine Beasts from The Legend of Zelda: Breath of the Wild. Next to this passage, it shows a picture of the golden wolf from Twilight Princess, which is supposedly the spirit form of the Hero of Time during the Child Era Timeline (Also for quick reference, the Twili are citizens of the Twilight Realm, like Midna and Zant). In page 31 of The Legend of Zelda Encyclopedia, it states, 'One of the legends passed down among the Twili for generation states, 'In our world, we've long believed that the hero would appear as a DIVINE BEAST''.
It is about the Divine Beasts' origins are from Breath of the Wild. I think I have a great idea for a new theory that could be on the Game Theory YouTube Channel. Hello MatPat, or whomever else reads this theory.