The Witcher 3 is indeed the game CD Projekt RED has previously teased for a February 5 reveal.
A digital subscriber of Game Informer magazine has posted a screenshot of the latest issue's cover, which depicts artwork for what is titled The Witcher 3: Wild Hunt.
It's likely The Witcher 3 will use CD Projekt RED's new, next-gen engine RedEngine3, which is capable of letting players roam huge worlds without load times. It will also power the studio's forthcoming Cyberpunk 2077.
The magazine cover is below, via NeoGAF. More details as they're confirmed.