Likely lineup for all 3.
Nintendo
Wii Music 2
Vitality Sensor and Wii Relax
Zelda
3DS and probably a lauch title or 2
Possibly Xenoblade and The Last Story although I'm not banking on it
Microsoft
Halo Reach
Natal and probably some major IP to go with it
Fable 3
360 Slim (?) and price cut
Sony
GT5 and likely a firm release date
Move and Ape Escape
PSP 2 (?) and likely PSP pricecut
Socom 4
LBP2
Twisted Metal (?)
The Last Guardian (?) although they'll probably save this one for TGS
"An announcement to rival the announcement of San Andreas timed exclusivity" (I'm guessing Agent)
A very slim outside chance of a PS3 price cut although if it does happen this year it probably won't be until closer to the hollidays
Really I can't say either way. Although if we get Xenoblade and TLS I'm giving it to Nintendo unless Sony's surprise announcement totally blows everyone's minds. Although if Kevin Butler is there Sony wins by default. LOL