The time for this is past. GOT rules, even if it's on a major slide, quality wise. In its wake are a number of great ( American Gods) and not so great fantasy IPs surfacing in both TV and movies. Witcher would seem little more than a derivative curiosity to American viewers. I've said it before - Sapkowski and his publishers had their chance to break into the western market, but it's pointless now. The greatest exposure he'll have is the games. If they do any large budget films, it'll have to be a Polish production.