Geoff Keighley has revealed that Nintendo's big surprise at the GDC wasn't The Legend of Zelda: Spirit Tracks...

The prospect of a new Zelda game on the DS has already sent the N-E team into a prolonged collective orgasm, but it looks like we haven't even seen everything Nintendo has to offer yet.

Geoff Keighley, the host of Gametrailers.com's show GTTV and their Bonus Round video series, posted this on his Twitter account moments ago...

"To answer your Qs, no Zelda is not the big surprise. That comes later today."

Both that, the Wii update, all the Final Fantasy titles and Nintendo's DSiWare and WiiWare plans was big news to us. What else could Nintendo possibly have planned?

Update: Geoff tweets that the "big surprise" is multi-platform.