It actually won't have to be retrieved if Nintendo actually goes forward with a post-Ganondorft storyline (God forbid). Nintendo has a real problem making alternate villains or storylines in their franchises.
Really? Zelda has never really had this problem...In fact, it's probably the most shaken-up franchise Ninty has!
Legend of Zelda - Ganon
Adventure of Link - Link's Shadow
Link to the Past - Ganon
Link's Awakening - Nightmare
Ocarina of Time - Ganondorf/Ganon
Oracle of Ages/Seasons - Veran/Onox/Ganon(only in a linked game)
Majora's Mask - Majora
Wind Waker - Ganondorf
Four Swords Adventures - Vaati/Ganon
Minish Cap - Vaati
Twilight Princess - Ganondorf/Ganon
Phantom Hourglass - Bellum