They tried porting the original Witcher 1 to Xbox360 and PS3, but that fell through for other reasons. As far as I am aware, they've never tried remaking The Witcher 1 from the ground up in a new game engine.
About TW1 consoles failure: http://witcher.gamepedia.com/Rise_of_the_White_Wolf
It was supposed to be a new engine:
While featuring the same narrative as The Witcher computer game, based on the book series of the same name by author Andrzej Sapkowski, it would use a new engine, created in cooperation with Widescreen Games, and a new action-based combat system.
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