Sony and Microsoft will finally give some real details about their systems, at least a better idea about what future games will show up. Expect to see a lot of InFamous: Second Son and whatever Rare is bringing back. I also expect to see a new Grant Turismo title be shown off using the PS4's hardware.

Nintendo is going to try to revamp the image of the Wii U, expect an announcement for some more core Nintendo games and they'll definitely be pushing Zelda Wind Waker HD. I am also hoping the rumors are true and we'll get to see some more of Monolith Soft's X title.

Capcom - Will probably announce some more zombie themed games including another Resident Evil game. Expect some fighting games as well, my hope is that Darkstalkers may have finally been green lighted.

Konami - will mostly show off more stuff for Ground Zeroes maybe a new trailer. MGS5 will also be there but I bet it will just be the old trailer. There will also be some stuff on Castlevania: Lords of Shadow 2.

Ubisoft - ACIV and that other big game that stole the show last E3.

Atlus - Pushing Shin Megami Tensei IV and probably some more niche titles for for the 3DS and Vita. I don't expect any big announcement from them until TGS.

Arcs System Works - Guilty Gear Xrd

Square Enix - I expect that FFXIV and Lightning Returns will mostly dominate SE's events. There is also the new next-gen FF that's going to be announced, which is either going to be Agni's Philosophy, FFVersus finally getting announced for next-gen, or possibly something new, but I guarantee it will most likely be a short trailer that Sony will show off in their press conference. Beyond the next-gen FF reveal, I don't expect to see anything new out of SE at the moment.