I think that both Sony and MS will have very strong showings this E3, with MS coming out on top with Halo 5 and Gears of War.
About Nintendo...
Well, i think that if people are expecting a showing like last year they will probably be dissapointed.
Last year, Nintendo hyped it good ("the one you have been waiting for" - they said) and they delivered! Their focus was clearly on 2015 games and they also had Smash and Amiibo.
This year, there's no predictable heavyweight now that Zelda is out. And they have already said that this E3 will focus on 2015 games.
Not that new games won't be shown. Although I can't really see them showing more than 3/4 games for 2016.
What games/announcements might be shown:
Metroid, a Mario remake, something CoD, Animal Crossing and 8-bit Amiibo to launch alongside Mario Maker!
I wouldn't be surprised if there's a Mario symphony coming our way to celebrate the 30th anniversary. :)
Overall, i think it will be a good show with some really cool games and probably more focus on 3DS than last year.
