Has Nintendo shown too much of their E3 plans?

This year's E3 is shaping up to easily be the most exciting in years, possibly ever. This is thanks to the fact that pretty much everybody needs to bring their A game as the big 3 all have a lot to prove. Sony & Microsoft have held their E3 plans pretty close to the chest. We don't have much in the way of clues of what they are going to show which makes it potentially extremely exciting.
As a Wii U owner I'm extremely excited about Nintendo's E3 presentation. But unless they are holding a lot back, we might already know too much. Here's their E3 site, and it constantly changes between extremely recognizable silhouettes.

So in this image alone we can see Pikmin, Link (most likely for Windwaker HD) a character from Wonderful 101, Mario on his own suggesting the already pretty much confirmed new Mario 3D title for Wii U, etc. Then we already know in some form we will see Smash Bros and Mario Kart. So is that it? Not that I'm not excited for these games, but a large majority we already know about. Nintendo doesn't need to "win" E3 but if they want to get some buzz going they need some surprises too, or nobody is going to be talking about them. This year's E3 more than any in years is one for new ideas and surprises and Nintendo needs some badly, not a bunch of known quantities when Sony is basically known for constantly showing off new IP and Microsoft promising at least 8 original games in the first year of the Xbox one. Hopefully I'm wrong and this is just teasing a small portion of what we will see or I doubt anyone will be talking about what Nintendo shows next week in the wake of whatever Sony and Microsoft show.

That's all for today but I should have at least one more post up this week with thoughts on the Project X Zone demo that should be up sometime today and Konami's pre-E3 conference on Thursday.