She has that aloofness in her face that would've suited either Black Widow or Medusa, but less so for Carol Danvers. For BW, it's consistent with being a spy and maintaining a cool facade. For Medusa, it's that regal air and the way she just carries herself generally with a certain elegance, poise and grace.

Or Jessica Chastain. I have seen Emilia Clarke's name a few time but even if I like her, I'm not 100% sure she's the best for Medusa.