Considering the games announced last year and the fact that viewership for the Game Awards skyrocketed between 2017 and 2018, I think theres gotta be some big name games teased/announced.
Sony would want to announce a big IP to be released relatively close to the PS5's launch. My best guess is its a Horizon Zero Dawn sequel, since its speculated its already in development and a notorious game like that one will help a lot boosting the PS5's launch sales. Edit: On second thoughts tho, this may be more likely for the next E3. Maybe.
A New Naughty Dog game teased. Possibly that new multiplayer IP we heard of a while ago.
Dragon Age 4 was teased last year, maybe another tease this year.
Nintendo is gonna announce Patch 1.1 for Pokemon s/s for february 2020 which will add 200 missing mons in the game. =P