This was reported by GamePressure, citing anonymous sources, and so far it should be taken only as a rumor. According to representatives of the resource, work on The Witcher 4 has already begun: Ciri will become the main character of the game, and the plot will unfold before the events of the third game in the series, telling the players about the girl’s travels to different worlds and her relationship with the wizard Avalak’h.
The Witcher 4 will not continue the plot of the third game for the reason that in Wild Hunt the true power of Ciri was shown, which no enemy can resist. Therefore, CDPR decided to return to a time when the girl’s strength was not so “clear”.
The Witcher 4 has not yet been officially announced, however, CD Projekt RED talked about the desire to return to the series. Meanwhile, the Cyberpunk 2077 will be released this September.