So far, the following things are confirmed to appear:
- Deus Ex: Human Revolution
- Red Faction Armageddon
- Final Fantasy: 4 Heroes of the Light
- Fallout: New Vegas
- Xbox 360's 'Project Natal'
- Nintendo 3DS
- Silent Hill VIII
- Halo: Reach
- Gran Turismo 5
- Killzone 3
- Mortal Kombat
- Saw 2
- True Crime: Hong Kong
- Dead Space 2
All the big companies will be there, expected to be revealed is:
- Final Fantasy XIV
- Metal Gear Solid Rising
- Saints Row 3
- Portal 2
- Elder Scrolls V
- Xbox Slim
And here is a list of devs who will be present