I always thought it would be cool to have a more magic-oriented Zelda game. We have had a Hero of Time, of Wind, this one could be the Hero of Magic perhaps. Zelda uses magic a lot, Ganondorf does, then theirs always witches or fortune tellers as well, so it isn't implausible that Link could be schooled in magic. The
OoT spells were lame (Din's Fire was OK); Link should be able to cast elemental spells just from his hands, or though arrows as previously done,or the sword power ups idea from above. Also, Link would definitely need light power to kill Ganon.
Actually, I'm starting to think that magic may be more associated with the Triforce of Wisdom, so this magic stuff may not as likely be in a game as I had originally thought.