Lemme think... (this is mix of personal wishes and expected things)
-Full unveiling on Xbox Scorpio
-Detailed info on:
Marvel vs Capcom Infinite
Days Gone
Detroit
Uncharted Lost Legacy
Spider-Man
Shenmue III
Splatoon 2 (more info on post launch content)
Super Mario Odyssey
-Basic Info/Teasers on:
Last of Us 2
FFVII Remake
Kingdom Hearts 3
Xenoblade 2 (I expect this to get delayed)
-DLC for:
Horizon Zero Dawn
Persona 5
Breath of the Wild (more info on it)
-More PS2 games for PS4
-At least two new IPs for PlayStation
-Huge update for Nintendo Switch, featuring video playback updates and extra features like video sharing
-Random spinoff from Nintendo based off Breath of the Wild
Last two is wishful thinking for me:
-Metroid teaser
-Persona spinoff for Nintendo Switch feat. the Persona 5 cast.
"Just for comparison Uncharted 4 was 20x bigger than Splatoon 2. This shows the huge difference between Sony's first-party games and Nintendo's first-party games."