Kat Dennings will be back as Darcy in Thor: The Dark World. However, reports are that she will be more than a comedic sidekick in this sequel.
Speculation has begun that Kat will play the role she was rumored to play in the first one — The Enchantress.
The Enchantress (Amora) is a great Asgard Macguffin. She can control minds, cast powers, travel through time, space and dimensions, bestow powers on others or anything else she pleases really. She is in love with Thor and will alternately manipulate or be manipulated to further that end.