Yeah, that was way out of left field. I'm okay with it, though, even if her model isn't exactly super-exciting (she's basically a Questing Knight).
Someone from CA made a comment on Reddit, I think, that they don't really care about timeline issues, and that TWW is more like the "SmashBros." of warhammer. Anyone from the past could be implemented. Not sure how I feel about that, but as long as they don't start adding stuff like Sigmar or Aenarion or whatever, It'll probably be good.
And one can only hope for the Grim & the Grom!