I don't know if this is the right place but, how about if like in ww you could replay over the file, but with bonuses, or a tottaly difernt playthrough?
Umm yeah you know how it was in ww, how you could play the quest over in your pjs and read the Hylian that the Deku tree and Valoo spoke. Something like that or a slightly changed quest.
Extra dungeons or side quests when you play through a game again would be cool. It would be cooler if you could alter your clothes when you replay it as well.