I don't really expect anything for this E3, at least for sony and microsoft.
They had their big chance last year with the new hardware, it will probably be less fun now.
I expect some reddit from both of them with uncharted4,the order, driveclub, etc for sony and Halo 5/2, QB, sunset overdrive, etc for microsoft... with maybe one or two new games for both of them.
Oh, and maybe a price drop for the one and morpheus for ps4.
I only wait this E3 for NINTENDO, i want to see them again, with some new video gameplay for Smash bros, X, bayonetta 2, etc...
+ some new games, like a new metroid prime, another F-Zero, waverace, etc...
And of course, they need to finish with a big trailer of the new zelda, and we will all forget about sony/microsoft :believe:
No really, i hope they won't do a little nintendo direct like last year..