Anyways, post info about upcoming presentations here, and maybe even predict a game or two.
Here's some updates I've found:
-Square Enix and Nintendo are holding their presentations at the same time, but I'm pretty sure we're all going to watch Square Enix's.
-Nintendo's mobile games, Quality of Life project, and upcoming NX will not be shown at E3. More info on the NX (Which has been confirmed to replace neither the 3DS nor the Wii U) will be revealed at E3 2016.
-Nintendo will have a digital event like last year, with a grand Nintendo Direct- like presentation. They will also have Mario Maker at Best Buy to demo.
-There will be a Nintendo World Championships 2015, (In place of the Smash Tourney) but with no details on what the games will be.
-Nintendo has some unannounced games that will launch before April 2016, probably too be shown at E3.
-There will not be a new Zelda demo this year.
...I believe that's all that's been said so far.
Anyways, here's my predictions: (Not backed by any proof so far because I'm trying to cut this short)
-Ryu and Roy announced as DLC in smash
-NEW PAPER MARIO ON THE WII U
-N3DS exclusives, namely a port of a Wii game and maybe a Pikmin title
-Animal Crossing U
-More Mario Maker
Hopes:
-NGC Virtual Console support
-Card amiibo versions of smash amiibo
-The new 3D Mario in development is announced
-MK8x Pikmin DLC (Or just more DLC for MK8 in general)
-Maybe another Mario spinoff, Mario Paint or a Luigi game.
Edit: A new Pokemon Mystery Dungeon game has been announced, called Pokemon Super Mystery Dungeon.