"The expansion packs will be whole new storylines with all the elements you've got in the main story (like cutscenes, new characters, new items, new Gwent cards) and many, many more. They will be quite long. The first expansion will be around 10 hours and the second expansion will be around 20 hours," Tomaszkiewicz explained in an interview
"And even now, if you sum up this 10 to 20 hours and you compare it to The Witcher 2, it's almost the size of The Witcher 2. And it will be cool, it will be new stories, it will be very emotional stories and I think that people will be happy."
First expansion Hearts of Stone is the shorter of the, and drops this October. It sends monster-hunter Geralt back to Oxenfurt, where he receives a new contract from "the mysterious Man of Glass". It sounds like more of an urban adventure, chock full of conspiracies and deceit. Blood and Wine, meanwhile, adds an all-new region called Toussaint, a land not touched by the war where "an atmosphere of carefree indulgence and knightly ritual masks an ancient, bloody secret."