I think it would be awesome to make a fictional (Witcher being totally nonfiction! lol) offshoot thats very much a prelude or simply takes place way before the events that Geralt witnesses. The good ol' days of being a Witcher! Like 1000's of years prior to Geralt, since Witchers live a long time, it would have to go back quite a ways. Back when monsters were everywhere and Witchers were abundant, though paid considerably less lol It would give us freedom to create our own witchers, choose our own school and go wonder a world full of monsters and people that need help to rid them. Not to mention there would be monsters that we'd never seen since many became extinct supposedly before we followed Geralts story, plus there would be more plants for alchemy since according to lore the Sun changed and poisoned the world killing off many plants and animals. I could definately see myself playing something like that, on top of the fact the possibilites would be endless as far as which direction we choose to go, total awesomeness. Would be a lot of fun, different yet still very much the world of Witcher! Yahoooooooooo!!!!! (^_ ^ )
-Zero