I think it's not unreasonable to expect some kind of bonus effort for WWHD – after all it's a remake, and Nintendo need to sway all those Zelda fans that are on the fence cause they've already played WW on the GameCube. Here are some bonuses I could imagine:
- Zelda themed Wii U console bundle - gold colored, triforced or something
- Zelda U demo - I'd be cautious, cause an unveiling this early could steal a lot of the game's thunder... but some kind of preview / prologue chapter? Just to show the mood and setting and style and make us curious about the story
- Four Swords Adventures remake - that would be amazing. Just update output to widescreen, make it playable with 3DS systems
- Soundtrack CD - dunno, did they say they are going to redo the soundtrack using orchestral recordings?
- standard swag - tshirt, keychain, figurine, poster
- reduced price