"You can't just have Geralt for every single game" says his voice actor, and if you think The Witcher 4 making Ciri the protagonist is "woke," then "read the damn books"
I've said for years that one or more of the main characters should be prominent, but you play most of the game as a custom character and you get to choose your witcher school. So I'm sort of hoping that she's the protagonist and main character in a similar way to how she is TW3.
Eh, idk. The Witcher universe has a framework for an RPG, but the books have always been about Geralt and Co. You could do something different in that universe, but I think the story and the games have some very strong structure that comes from the player being Geralt and living his story.
Witchers are a rare dying breed. Trying to shove another new generic Witcher in would force you into writing a whole new series of stories, and backgrounds, just for that one character, which would make it get lost in the mix imho.