From NeoGAF

http://na.square-enix.com/us/blog/square-enix-e3-2015-conference

E3 is just around the corner! With our exciting slate of games coming out in 2015 and beyond, Square Enix will be hosting a dedicated E3 conference in Downtown LA on Tuesday, June 16, at 9AM PST/ 5PM GMT/ 1AM JST. Start E3 right with a dose of some exciting news before the show officially kicks off later in the day.

What news do we have in store? You’ll just have to wait and see. Can’t attend E3? Not a problem. Viewers unable to attend the show can follow us on our live streaming channels below and see the conference as it happens:

Also isn't this the same time as Nintendo? Don't they usually do theirs at Tuesday 9am also?

I'm guessing KH3, FFXV, Deus Ex, Hitman, Dragon Quest Heroes, maybe SO5, Just Cause, and maybe more Tomb Raider(it'll be at MS conference too).

Im not a big fan of SE, but the more the merrier

is this a first? i cant recall them doing one before. I'm so excited about this XD

Its a first for both SE and Bethesda this year

PLEASE BE EXCITED!

Not going to lie, I'm pretty excited about this lol. I'm just hoping for PS4 announcements, maybe DQXI.

FF XV hype lets go!

And yes its at the same time Nintendo do their thing :O

I'm excited for the possibilities.  But usually always disappointed.

*Please be a Crisis Core remaster for PS4

Awesome, I mean they have more than enough games to show off this year.
FFXV, KH3 (doubtful though), TR, Hitman, Just Cause, Deus Ex, Star Ocean, DQ Heroes, Bravely Second, Final Fantasy Explorers and FFVII =P
And if they have anything else, although I think they already have more than enough really.