Re: Alice Krige as.....?
It seems like they should have named her character by now if she were the Elf Queen, the other guesses I could see them keeping her under wraps to surprise people in the theater. The only reason I can think they may not have is if her appearance is meant to be a big surprise to the audience. I am also wondering if she might simply appear in the end scene, to lead into Avengers 2.
On the part of the synopsis for the film, where it says "shadowy enemy that predates the universe itself", out of curiosity are there any female characters that might fit that description?