If you think there are too many shows now:
The Witcher is just one of the many big-budget, ambitious fantasy series you’ll be able to watch on TV in the coming years. Amazon is investing billions of dollars in a show based on J.R.R. Tolkien’s The Lord of the Rings. (The company is also developing shows based on Conan the Barbarian and The Wheel of Time, a popular series of novels by Robert Jordan.) Showtime is making a TV show based on the fantasy book series The Kingkiller Chronicle. And HBO, for its part, isn’t quite ready to let Westeros go: It has already ordered a Game of Thrones prequel, titled House of the Dragon, straight to series.
However, if I were a betting man, I bet the Showtime show never gets finished...