JFarrell71
SasqWatch
I don't mind a prequel starring Ciri, I liked her. I do think it'd be a lot of fanservice to do that, though, and has a very high potential of not meeting the expectations.
But honestly, next Witcher game has a very high potential of not meeting expectations anyway, because it won't be following a well written script based on a best-seller book, and take numerous "licenses" very prone to screw it all up ala Game of Thrones.
CDProjektRed already did that with the first three games. They wrote tons of their own stuff. If anything, the next game may have more direct contributions from Sapowski, since they seemed to have made up.