RUMOR: Felicia Day Playing A Known SHIELD Agent In Avengers?

There has been talk of Felicia Day (Dr. Horrible, Buffy, Dollhouse) possibly landing a role in Avengers since 2009 with her early confirmation that Joss Whedon landed the director's chair before it was announced. Now the ever unreliable IMDB lists her as Agent Abigail Brand. The lesser known agent is the head of SWORD a sub-division of SHIELD that focuses on extraterrestrial matters. It sounds about right as the role could be nothing but a cameo. Of course until it's announced by Marvel it's just a rumor and appearing on IMDB doesn't help validate the claim.

UPDATE: Felicia Day has debunked the rumor via Twitter. "Wow, I log off for a few hours, crazy rumors flying around. As cool as it would be, they are not true. Love you all!"