It’s unlikely that CD Projekt RED will work on the new The Witcher game anytime soon.
Doug Cockle is the voice of Geralt in the series, which means he should have a bit of insider information. At EGX 2017, he said that he knows nothing about The Witcher 4. He added that the Polish developers are now fully committed to Cyberpunk 2077, in which he would participate if he had the chance to do so. He’s been with the team since 2005, so we should take his word seriously.
It’s understandable why we won’t see The Witcher 4 shortly – the Poles usually work on just one game at a time, but their results show that it works for them. Let’s just hope that Cyberpunk 2077 is going to b another amazing game from CD Projekt RED! (Especially if its playable area is going to be four times the size of The Witcher 3’s!)