She knows, but she can't say.
As reported by MTV's Splash Page blog, Dennings told a Blip-GoldDerby web showthat "I do know the answer to that, [however] I do not have the clearance to talk... interpret that as you will. ... I've asked when I can say things, but apparently I can't yet, so that will come soon."
It's probably a safe guess, at that stage, that in spite of most of the film being set in the Other Realms, Dennings and Natalie Portman will still play at least a small role; it seems odd for her to be under an NDA or even just a vow of silence if her character had been deemed inessential and written out of the film. She's also a young star on the rise and someone Marvel probably wants to keep tabs on, considering that her contract probably has her for pretty cheap compared to what she's asking now.