I think it would be cool if, in ZW, you got to pick an instrument... (Sax, trombone, trumpet, etc) Also, I would really like Nintendo to bring back the Megaton Hammer. *screams* "HEAR THAT, Nintendo??? BRING BACK THE MEGATON HAMMER!!!"
Instruments would be awesome, I really loved any instrument in any Zelda game. Also fire and ice arrows, and MAGIC! Magic is one of the core Zelda elements that needs to come back. Any or all of these would be awesome in the new game.