Re: Alice Krige as.....?
She said she'd be unrecognizable, but I don't think she said she'd be a villain, necessarily.
Hela or Karnilla, could be; but traditionally they're shown as having the usual pin-up bodies you see on comic-book women. Not sure Alice is sexy enough for that now.
I'm thinkin' more of an old crone like Volla, who comes in for a brief cameo to foretell Thor's doom, and the coming of Ragnarok. My hunch, til I see the photos.
THE COTTON AVENGERS
...They move like slick cotton on oil.