Also there's Crash Bandicoot as well. I definitely think some of those games have a chance of appearing in trailer form.Gow Cory said so I thought.
Kojima might show up but no way is any gameplay ready
Days gone got some mixed feedback at e3 and demos take a lot of work. Doubt they decided rushing to make a psx one would be worth it.
Spiderman has hinted of releasing soon so that's why it's a maybe.
Just look at last year. E3 2015 had Dreams, Horizon, TLG, FF7R, and Shenmue 3 announced. FF7R was the only one to show up at psx.