Here is what I think will be shown.
Start off with a new trailer and some details for Donkey Kong Country: Tropical Freeze, one last time to show off the game before it releases.
After that they will announce Luigi's Mansion: Dark Moon HD to be released sometime in between DKC and Mario Kart. This game was rumored awhile back and Iwata even said Year of Luigi would continue into 2014. This game will release just about a year after after the original release and will conclude Year of Luigi.
With the end of Luigi begins the Year of Yoshi. They will show a trailer for Yoshi's New Island and reveal a special edition 3DS to release alongside it. Also they will have a trailer for Yarn Yoshi and confirm it will release sometime this year. Also he will be officially announced for Smash Bros.
Next up will be trailers, new info and release dates for the games releasing by E3. Im guessing Kirby Triple Deluxe+Mario Golf: World Tour for 3DS and Mario Kart+Bayonetta 2 or Hyrule Warriors for Wii U.
Maybe another surprise or two but nothing major.
When the herd loses its way, the shepard must kill the bull that leads them astray.
