Wow, it's that time already? I didn't even realize it! Time's passing fast...
Here's what I think will be there~
When it comes to Zelda, I don't think there will be many announcements, really. There could be some news on the next game(which is on 3DS, correct?), but that's all I can think of.
For 3DS, there probably will be a bunch of game reveals, release windows/dates for games already announced( like Paper Mario, Animal Crossing, Luigi's Mansion 2, etc.). And probably something about its connectivity, sales or something like that. Nintendo does like to talk about how well their systems are doing.
More than anything will be WiiU stuff. There will be a finished model(if not almost) to show, a release/price will be given, launch games announced, and probably another game or two that will be huge(Though may come out later)
Since seeing this thread, I am now excited and counting down the days! Wooo!