It's something reasonable if the Witcher gets new series given how popular the games is.
About some times ago, the fourth series from the games has been confirmed, but it was just a picture and no more explanation.
Unreal engine will be the games new engine, instead of Propietary. The good news is, the role for game director has been appointed.
Game director surely is one of the most important position.
Sebastian Kalemba has been appointed for this role, and before that he was involved with in Cyberpunk and also for the Witcher 3 lead animator.
The Witcher 4 itself will start a new adventure, and it's gonna be something special for gamers.
see also: The list of Graphics Card to allow you play in 1080p games
