I think most of their presentation will be elaborating on games that they have already teased (Animal Crossing, Link's Awakening, etc...). There will be at most 1 - 2 first party games that we haven't heard announced yet.
However, I do think they will show a decent amount of third party games that have so far been unannounced for the Switch. I also expect at least a couple Switch exclusives in this bunch.
curl-6 bet me that PS5 + X|S sales would reach 56m before year end 2023 and he was right.
My Bet With curl-6
My Threads:
Master Thread, Game of the Year/Decade
Switch Will Be #1 All Time
Zelda Will Outsell Mario (Achieved)
How Much Will MH Rise sell?
My Bet With Metallox