Is this game still in development? or was just a vaporwave?
They still work on it, they'll talk about it next year, when The Witcher 3 and all it's DLC will be released, it's just how their marketing works.
The game is still running, just.... wait.
They can't promote two game at the same time, at the risk of shooting a bullet in their foot.
Imagine if Cyberpunk fail, or if people are like "fuck The Witcher 3, I'll play Cyberpunk instead", they'll have wasted a budget over a fail.
It's more interesting for them to sell The Witcher 3, and then coming with their new game, once they fully have their money back
(if we can call it like this) on "The Witcher 3"
So, just be patient.