Here is the hype I will predict.
No new hardware reveals, except maybe extra attachments. We still need to see the headset/microphone that will be used for communication online.
We will get launch information, price, and games.
So what will be the big surprise? It will be the games. I predict nearly final versions of all launch games including, final graphical builds and final control schemes for games like Metroid Prime, Red Steel, Zelda and more.
I expect new demos of Mario Galaxy to blow us away. And for the Germany demos of Strikers and BWii to be just as awesome as they were before.
Finally, I expect a demo version of Brawl to be on hand to blow the media away. It will be a big huge deal, and Nintendo will even hold a limited tournament with the winner getting a priced limited edition DS.
The supposed hardware news will be the unveiling of Wii24Connect's Virtual Console services. Nintendo will have a partial list of available games at launch that will completely destory Xbox Arcade's game list. We will get a price structure, and see how the interface works. Finally, it will to noted that these purchases can take place on your computer and 24WiiConnect will automatically download them to your Wii, or you can buy access cards in stores that will grant you the ability to download games.
Those are my predictions.