Originally Posted by TTFN
Wasn't it rumored Jane was to be possessed by some sort of Dark Elves spirit? That sounds eerily possible even more so now with Malekith and Jane being in the same place.
I think the exact characterization was "Thor becomes reunited with Jane who becomes possessed by a Dark Spirit, which is connected with the Dark Elves"
So not necessarily a Dark Elf him/herself, but affiliated with them.
Also, the general thinking is that the spoilers concern things that happen early in the film. So if these scenes with Malekith and/or Jane (haven't seen them all together yet) are set early in the film, then I agree it's quite possible. If these scenes are set late in the film, maybe less likely.