And just to clarify ... their translation says CDPR would "probably" return to the world of the Witcher ... which to me doesn't sound inevitable. Perhaps more likely than not though ... which is interesting.
I'm posting the exact translation of the part (it starts at 15:06 mark) where Kicinski talks about another game in this universe just so anyone could make their own conclusions:
"There won't be The Witcher 4, as another part of the story, because this story was finished. However (...) we bought (and own) the rights for The Witcher, so it's hard to imagine that after investing 15 years of our lives and tens of millions of dollars into promoting it, we would just forget about it. I mean the fans and investors alike would not forgive us for doing so. But first we need to come up with some really cool idea for it."