Without a doubt, animal crossing U... Mario kart 8 is already advertising that game with dlc.
Ip from platinum... Wii u late 2016 release.
New nintendo ip, in the same league as splatoon.. Not too high budget, not too low.
DELAYS! Or ill have to wait to eventual march nintend direct focusing on wii u games.. Too silent anout the supposed 2015 games.

Yah, I wouldn't mind if they went the TTYD or SPM approach as I enjoyed both games a lot!

I really want to see the same mix of Direct and Nintendo Treehouse that we got last year. It made for the most interesting E3 in years.

Another one like SPM would be nice too, but at this point I just want Nintendo to make the PM game SS was supposed to be, a worthy successor to TTYD!

Zelda HD Holiday 2015
Zelda HD trailer with new music, whole different from past entries
Zelda HD downgrade, map smaller than expected
Zelda HD no green tunic, blue outfit as main tunic

SPM isn't a paper mario. only paper mario and TTYD are.

Apparently they are renting out a conference space so there will be live stuff going on. Whether or not it will be a full conference or Treehouse stuff remains to be seen. I loved what they did last year. It destroyed both of the twins without having to even be there. It could be refined and expanded upon without worrying about dead air and awkward pauses like we saw from the live conferences.

As for games, I want more Wii U stuff. Xenosaga trilogy HD gets announced, and I'll buy 3 copies. They also need to announce a partner program to have amiibos made for 3rd party games. Bayonetta 2 needs to add Amiibo support. Zero Suit Bayonetta? DK outfit for Rodan? And if they announce a Bayonetta Amiibo I'll be trying to order it like those guys order Jordan Sneakers.

I want to be surprised in the good way.

The Digital Event was great - perfect medium for Nintendo and I hope they keep that setup. Less money and time on fluff, more on what we want to see: GAMES.

Metroid will hopefully be revealed in anticipation of the 30th anniversary. Not sure whether it will be 3ds or Wii U, but at this point, just something, ANYTHING, would be orgasmic.

I'd love to see an old IP reboot, like Startropics or something.

Parroting everyone else, obviously we'll see trailers and in-depth gameplay of Zelda U, XC:X, and Starfox U. We had some cool surprises last time, so I'm optimistic that they have some tricks up their sleeve for this year.

Digital Event for sure, it worked really well for E3 2014. Conference for E3 2016 and E3 2017 announcing the 3DS and Wii U successor.

Here's my prediction list for the Digital Event (in no order)

The Legend of Zelda Wii U - Trailer with Holiday 2015 at the end of it, and name unveil
Xenoblade Chronicles X - Trailer with NA release date
Yoshi Wooly World - Trailer with release date
Mario Maker - Trailer with release date
Star Fox Wii U - With First trailer and a Fall 2015 release date at the end of it
Devil's Third - Trailer with Holiday 2015 release date
Project Treasure - First Trailer and a release date frame
Metriod Wii U - Announcement Trailer, 2016 release
Animal Crossing Wii U - Announcement Trailer, 2016 release
Pokken Tournaments - coming to Wii U with 2016 release
New Nintendo third party saved title ala Bayonetta 2 and Devil's Third
New Mario Sport title - Wii U
Shin Megami Tensei X Fire Emblem - First trailer, 2016 release.

Wild Guesses
Paper Mario 5 - Wii U
Super Mario Galaxy 3 - Wii U
A new retro Nintendo revived series - Earthbound, F-Zero, Star Tropics, or etc
Project Ukelele (AKA The Banjo Spiritual successor) is Nintendo published