Your For Sure list seems pretty likely. My guess would be most of the following:
-New 3DS release dates and info (lots of it).
- Majoras Mask release date
- Monster Hunter 4 release date or window
- More Codename STEAM info
- Amiibo info / trailer
- Mewtwo trailer and Smash update info
- Kirby trailer / info and hopefully EU release
- Mario Kart 8 DLC trailer
- Release date for one of Mario Maker / Yoshi's Woolly World around May, "Summer" release for the other along with Splatoon.
- Xenoblade N3DS info and possible release date, Xenoblade Chronicles X fall release window.
- Possible trailer or footage for Star Fox, coming late fall.
New 3DS, Majora's Mask, Codename STEAM and possibly MH4 / Xenoblade N3DS remaster will be the focus, Wii U info will mostly be Kirby or Smash/ Amiibo/Eshop/VC stuff, with a bit more concrete info on Yoshi / Mario Maker / Splatoon and a taster for one of the fall / holiday games. If there's a surprise announcement it will be a future 3DS title, possibly N3DS exclusive.
