I still haven't seen all the trailers I wanted to (still need to watch everything Nintendo related), but based on what I have seen:

Assassins Creed Origins

Anthem (can seriously see which Bioware team the main resources went to and why Andromeda turned out the way it did)

Age of Empires Definitive Edition (seriously loved the original)

Detroit: Become Human

God of War

Spiderman

I actually think it was South Park.
Even though Mario x Rabbit, Mario Oddessey, Spiderman & Detroit looked fantastic too.

Hard to just pick one.

Assassin's Creed Origins, just as Imlove the series and this really seems to be bringing something new, or at least fresh, to a formula that had been starting to tire.

Star Wars Battlefront II is a close second.

Spiderman, everything I saw was perfect and I'm so excited for it.

God of War

Samus Returns and Mario+Rabbids.

Anthem by a landslide

Honorable mention to Metro Exodus though

Oh I forgot. Yeah Anthem was easily the best looking new IP. That deserves its own thread too.

Anthem for me

Spider-Man