So what are the mystery Wii U games Nintendo is talking about?

[CM30]

Their names are 33 characters, 27 characters and 19 characters long, leaving quite a few possibilities.

Here are some I heard:

The Legend Of Zelda: HD Collection

Kirby’s Adventure 2

New Super Mario Bros. Wii

Kirby's Adventure 2

Donkey Kong Country Forever

What ones do you expect?

 

[Space Core]

New Super Mario Bros. Mii

Fixed.
And that WAS revealed quite a bit prior to the Wii U's Reveal at E3 last year.

 

[Bloody Gallade]

I've heard "The Legend of Zelda: Apostles of the Golden Age" and "Metroid Prime Ressurection". I extremely doubt them, however, it'd be nice to see a metroid game at launch.

 

[ninjablooper]

I personally would like to see a new Starfox or F-Zero game, but well their names are kind of short unless they have some long title.

 

[SpoonySage]

If one is a Metroid Prime-style game where I use my tablet as a scanning visor then they just sold me a Wii U.

 

[kunino-sagiri]

New Super Mario Bros. Mii

Fixed.
And that WAS revealed quite a bit prior to the Wii U's Reveal at E3 last year.

They said it was a tech demo and not necessarily indicative of any actual game, though.
Since it hasn't been officially revealed as a full game, it would probably still be counted as one of the 'mystery' games.

 

[Johnwaluigi]

I was sure Pikmin was going to be one, but unless it has a 13 word sub-title, it's unlikely to be one of those games...