[Update #2]: CD Projekt Red has announced that there is a new Cyberpunk 2077 sequel in the works, along with numerous new Witcher games and even a brand new IP!
[Update]: It looks like CD Projekt Red has kept them selves quite busy! In addition to the new Witcher and Gwent games, they have now announced a new Cyberpunk 2077 expansion, as well as a spin-off game.
With the launch of The Witcher 3's final expansion Blood and Wine CD Projekt Red finally gave Geralt a well deserved happy ending. Yet despite the main storyline being wrapped up, they left themselves open to the idea of revisiting The Witcher universe at some point in the future, though with different characters and locations to explore.
Quite a few years have gone by since then, but I'm very happy to say that 'some point in the future' has now arrived as a currently unnamed The Witcher 4 has just been announced! Similarly, the gameplay details are completely nonexistent, but what I can tell you is that The Witcher 4 will be a massive open-world game built in Unreal Engine 5.
As for the setting, the only clue we have so far is the mysterious medallion pictured above. It does not belong to any of the main Witcher schools I'm familiar with, though it's possible it's from some sort of offshoot of the School of the Cat, or perhaps even just a new design.
Whatever the answer may be, I'm afraid we'll have to wait for quite a while in order to find out as it looks like The Witcher 4 has only just started development. Once more details become available, ideally alongside an actual trailer, I'll make sure to let you know.
Until then, I do believe it's time to give The Witcher 3 another playthrough!