As a Polish attorney, not specialized in copyright as I may be, I'd say that Sapkowski has good shot at winning some money. CDPR has some arguments to reduce the amount. For one, there is the question of how much of their profits was due to the copyright to the Witcher franchise and how much due to their own work. And given that books were pretty much unknown outside of Eastern Europe it might be argued that the license itself was only responsible for fraction of the profits. Also, the court has discretion in ascertaining what is the author's due remuneration. Given that games pretty much opened a giant, new maket for the books - introducing the Witcher to English speaking audience, and indirectly allowed Sapkowski to get a caontract with Netflix, it is possible to argue that Sapkowski has indirectly profitted from the games. Given the narrow scope of the quick research into the article 44 that I did, the chance court will acknowledge the merit of the case seems rather high, but the due remuneration is pretty much in the air.