Predict what will be announced at E3

[JEMC]

Too early to say. There still haven't been any of the usual (and unvelievable) rumors that precede the show, but

Nintendo

1. New third party exclusive game from a japanese developer for WiiU
2. New WiiU sku with more memory (64Gb more likely) in both black and white. Same price.
3. Reveal of the DLC plans for Mario Kart 8
4. Announcement of the aprox. launch date of Monster Hunter 4 in the West
5. Reveal of a new Free to Play game.

Sony

1. New footage of DriveClub along with new info on how it will use Morpheus and an estimated launch date
2. New Guerrilla IP
3. New game from Naughty Dog
4. At least one new third party exclusive
5. Agent will be shown (j/k)

Microsoft

1. Halo 2 HD remake (I'm not very original here)
2. New Fable game
3. New or extended partnership with a media content provider
4. New Kinect game/app
5. New XboxOne sku with a 1TB HDD at the same, current price that will coexist with the current 500GB model that will have a $50/100 price cut.

Third parties

1. CoD 2014 revealed, with timed exclusive content for one console (more likely the XboxOne)
2. New FPS from EA that substitutes Medal of Honor in their plan to have 2 games competing with CoD (there won't be a new Battlefield this year because...)
3. Mirror's Edge 2 will be revealed
4. New game from Take 2.
5. Ubosoft will reveal a new Just Dance... and yes, there will be dancers on stage.