I'm going to have such a interesting time thinking on a character. I have an idea for one. Um... If it's a villain instead of being related to Gannon how about Girahim?
Well Ganon would eventually be the main force, but we could have an Aghnahiem kind of character in place of him while they work on ressurecting the evil king
Also, out of curiosity, any Zelda's here? As in, Zelda-figures (the King/Queen/Princess/Prince of Hyrule)? That character doesn't have to be kidnapped this time xD