Yeah would be funny - maybe some cameo as a monster or voicing a doppler etc. It's going to be strange hearing Cavill's voice as Geralt when being so familiar with the game english voice.Would love if they can give Doug Cockle a bit part also, would seem fitting, although probably won't happen by the sounds of it. Would be great if he had a cameo as a guard, and mocked Cavill's Geralt using HIS Geralt voice, nice little nod kinda thing or something similar.
For the English speaking world, HE is the voice of Geralt for the last 10 years or so, so it would be great if they could get him into the series SOMEHOW, even if the show will be based on the original book timeline rather than the game timeline/period.
I'm interested now to see the whole roster of supporting cast once they've finalised it. Wasn't initally thinking Netflix would do a proper job on this but now coming around to the idea this could be a great series.