It seems there hasn't been much conversation about this character, so I thought I'd start one...
It's no secret the Avengers could use some female members. It looks like we'll be getting Scarlet Witch (unless the whole Quicksilver battle ends up with the twins not being used in Avengers 2), and I bet we get Wasp at some point with Ant-Man. How about Spider-Woman?
Since HYDRA has already been established, her origins wouldn't be hard to incorporate, possibly in a Captain America film first. Or she could just be a product of SHIELD.
Do you think her rights are complicated due to the similarity to Spider-Man? I'm not sure how these rights issues work. Would the name Spider-Woman or visual allusions to his costume (like the eyes) be usable?