This is my list of what I think will realistically show up.
-Dead Don't Ride by Bend Studio (they'll most likely open the show with this)
-Horizon: Zero Dawn by Guerilla Games (new gameplay, new mechanics, 2017 release date)
-Dreams by Media Molecule (beta announcement)
-Gran Turismo Sport by Polyphony Digital (demos on show floor, not sure what they could do for the conference though as we pretty much know everything now)
-Gravity Rush 2 by Japan Studio (new gameplay, vague 2016/2017 release window)
-The Last Guardian by genDesign & Japan Studio (final release date)
-Detroit: Become Human by Quantic Dream (scene from the game)
-Matterfall by Housemarque (first gameplay footage)
-Ni no Kuni II by Level 5 (first gameplay footage)
-WiLD by Wild Sheep Studio (new footage)
-Persona 5 by Atlus (US release date)
-God of War IV by Santa Monica Studio (this will most likely close the show)
These are all the big games I could think of. I'm sure there will be indies & other surprises sprinkled throughout, but even without those, I think this lineup is pretty solid.