CDPR announced that the upcoming Witcher instalment will be based on Unreal Engine 5 in a strategic partnership with Epic Games. The developers didn't divulge any other information pertaining to the game, but hints from CDPR executives seem to indicate that "The Witcher 4" will probably not face development crunches like Cyberpunk 2077, and we might see the School of the Lynx getting a real introduction.

https://www.notebookcheck.net/Upcoming-Witcher-to-shift-to-Unreal-Engine-5-CDPR-execs-assure-avoidance-of-crunches-and-hint-possible-storyline-around-Ciri-and-School-of-the-Lynx.609341.0.html