The Legend of Zelda: Psalm of Somaria
It would elaborate on who or what the hell Somaria was. lol (See Cane of Somaria) Link and Zelda would have to team up to prevent a prophecy lost in time from occurring. The clues to prevent said prophecy would involve the cryptic song known as the Psalm of Somaria. They would have to get the four cardinal deities to sing the psalm in harmony to open up a gate above the Temple of Time. The twist would occur when they find out that the song was hexed, and it now awakens a massive, vile beast that consumes Somaria, the master of the four cardinal dieties. The beast would then emerge from the portal in the sky and devour Hyrule Field and all its towns and inhabitants. Zelda leaves on a mission to consult the four cardinal deities to find a solution, along with her guard Impa. Link enters the mouth of the beast to find known other than "GHIRAHIM"! Mwahahahaha! Just kidding, but he'd find the guy (or woman) who hexed the Psalm of Somaria. Meanwhile, Zelda would be nabbed, after she consults the deity of the west, whom she finds out was hexed along with the other dieties, whom were hexed in the past along with the psalm. Impa would make this fact known to Link and he'd have to go on a journey to save Zelda and Hyrule with Impa as his ally along the way...
It might be subject to a title change during localization/translation, as several past Zelda titles were, given the word "psalm." It's a word that many people are not aware means "song of praise." Psalms is a word featured prominently in the Bible, but it is not intended to reference the bible in any way in my hypothetical Zelda title. Nintendo of America might it necessary - in this scenario - to change the title to avoid any religious references, specifically Christianity. Hooray for controversial titles!