I don't think MM3D is coming til later, unfortunately. Maybe it'll be shown at E3, but maybe not.
Ok but here are my overall thoughts on what was shown;
Yoshi's Island 3:
Looks gorgeous, background wise at least. I'll be skeptical on the platforming quality til I play it myself, and Yoshi's sprite is a liittle offputting, but it also looks like early versions of Yoshi's Island, Yoshi's Story and the Yoshi's Island cutscenes. Looks brilliant though, excited!
Mario Party 3DS:
Looks far better than the last couple of Mario Party games, but unless it's got online multiplayer or download-play multiplayer, no way I'll be buying.
Pikmin 3:
Looks brilliant, I love the new pink Pikmin much more than the rock ones! Shame about the delay though, now it's not coming til August :/
Zelda LttP2:
I'm callin it that for now, but wow LttP Link now has 5 Zelda games to his name? It must take a lot of work rejuvinating a dying timeline it looks BRILLIANT simply through definition, a brand new 2D Zelda game with a Link that isn't Toon Link, in an era that hasn't had a game for like 15 years! Considering how much wasted potential were in ST and PH, I imagine they have tons of great ideas for this one, I'm already loving the wall-gimmick.
Lastly I'm really happy about Bravery Default, the WiiU update and Earthbound because holy shit, it just proves more than ever that Nintendo listen through Miiverse! I've never seen Nintendo caring about their audience's thoughts so much before! And I finally get to play Earthbound myself!!
also @LS:
I doubt SMTIV has much to do with Atlus so much as NISAmerica, who claimed to be helping make Atlus games for Europe a lot better than the past, they're not a fan of how crappily Atlus treats us so I'm sure this is part of their apology efforts to EU fans.