Is Marvel's Colbert Report Announcement A Female Captain America?

I'm going to start by saying that this is all just speculation on my end. I don't know if that's what they're going to announce or even the character/title they're going to talk about. They didn't give any word clues like they did earlier in the week for their Thor announcement. We do know that Colbert like Captain America. We do know that there's going to be a new Captain America. But is Marvel brave enough to make not one, but two of their "Big Three" characters women? Again, it's just speculation, but I'm kind of curious. I might actually have some respect for Marvel. I still think they're a reactive rather than proactive company, but if they do something like this... that might change my mind. Thoughts?