Eva Green
Firstly, I adore Ms. Green and am anticipating this movie so much!!! I heard Eva can be a little OTT and campy in this role (one reviewer mentioned she goes into Mommie Dearest territory haha). Whilst this is not everyones taste, for me personally, that's a BIG endorsement!!!
As splendid as she is as an actress (the emotion she can display without dialogue is second to none), no one chews scenery better than Eva Green.
Can't wait!!!