We know ND's current projects are minimum two SP games, one apparently started in 2021, a few months after TLOU2 release, and other one around early 2023.
I'd bet the first one would be a new Uncharted, they'd have continued working on Bend's game once Bend focused on their own new IP.
I'd say that after a very long preproduction, the one whose production started in early 2023 is a new IP. Probably not a current time, realistic new IP but maybe something with in a more fantasy, maybe futuristic setting.
And who knows, maybe after killing TLOU Online they reused a good part of the work done on it and staff working there to start TLOU3 in H2 2023.
Other than that, I'd say their next announcement would be Uncharted Nathan Drake Collection refurbished for PS5 and PC by Iron Galaxy.
WHY ARE WE YELLING?
On a serious note, Don't they have a new IP coming like Cory Barlog? I hope we see it this year. Maybe with the PS5 pro reveal?
When shipped 2018, Cory said that he was going to take some vacations with the family and was going to pitch a new IP after it.
We don't know if it was pitched and if was approved, but it is fair to assume that it was the case, because SSM was working "on multiple projects" some time ago, when they were working on GoWR and overviewing PC ports and first steps of the movie adaptation.
Astro Bot was trademarked back in August and announced a few days ago. Sony trademarked Intergalactic: The Heretic Prophet back in February, meaning it could be announced in the next few months, maybe in H2. If it isn't that game isn't "goo game", it should be Cory's new IP or other unknown 2nd party game. I bet it's Cory's IP.
In case Cory's new IP would have started in 2019, a 2024/2025/2026 release is very likely, and could match with an announcement this H2 2024.