Personally hoping for a Shenmue 3 gameplay trailer, but I am not very confident that they have anything to show in that regard. The ETA of the game is supposed to be end of 2017, but to me this seems overly optimistic.
Other things I'm hyped for are Mahvel and SFV Season 2 showings.
Edit: And another thing I would love is if they show stuff like: "And this is how good Horizon will look on the Vanilla PS4, you filthy early adopting peasants are not getting a lesser version of the game!". Like, I know that it will look better on the Pro, but show us that they don't phone it in for early adopters and optimize that shit graphically so it takes full advantage of the given hardware.