It'll be 40 minutes long and will "mostly" focus on games releasing in the first half of the year, but fact it says "mostly" means we'll still get some stuff releasing later on.
The safe predictions I've got are:
-New Tears of the Kingdom trailer either reconfirming it's still coming in May or a shocking announcement of a delay to later in the year, and they'll likely release a Zelda themed Switch OLED alongside the game too.
-Advance Wars 1+2 Re-boot Camp finally gets a release date, likely for March or April
-A new teaser for Pikmin 4 that confirms a release window of Q4 2023 or something and to "stay tuned for more info later in the year"
-New Bayonetta Origins trailer (it is coming out next month)
-A reminder of the Mario movie coming out in April
Now those are just the stuff I think is on the "very very likely to be in the Direct" side of things, the stuff I'd like to see but maybe won't be shown are:
-Wind Waker and Twilight Princess HD double pack finally confirmed and will be releasing late summer or early fall
-We get a more concrete answer on when the next batch of NSO games we know are coming will release on which months (namely we lack months for things like Mario Party 3, Excitebike 64, and the Pokemon Stadium games)
-Xenoblade Chronicles X finally gets a Switch port and it's coming out summer or fall
But anyway as of posting this the Direct is tomorrow so lets see what happens.