Depends. Technically, they could spend many years on The Witcher 4, upgrading everything and polishing a new gameplay system with the story all planned out with the tools to create new content all set up.
Then release The Witcher 5 three years later. Then release Witcher 6 three years later. They would be iterative sequels.
It would be a 6 year release schedule from the perspective of a player but could be 11+ years of development. Unreal Engine 5 does also make games easier to make even if it has issues.
But even if 6 years is possible, they’re probably just saying nice stuff for investors. The Witcher 3 sold for so long that sequels releasing close to each other might need even make them more money.


