Who is the next Fearless Defender?

So we've been given this teaser image on who's going to join the Fealess Defenders. So far, Valkyrie, Dani Moonstar and Misty Knight are in. But who is this next figure teased by Mark Brooks?

[img]http://24.media.tumblr.com/8027091401c57da309b69bd8ea7456c1/tumblr_mfogh83cyN1rll8v1o1_500.png[/Img]

I think having Mockingbird would be cool on this team.

@MatKrenz: I don't know if she will be on the Defenders, but Mockingbird will be part of Secret Avengers relaunch.

@jsphsmth: Didn't know that.

I would like Hellcat/Black Cat/Tigra for the agile fighter role and Satana for magical support to help round out the team.

X-23 (when she's done at the bloody island), Black Widow, Rogue, Domino and maybe/maybe not Elektra.

But it would be great to see others joining in like Jubilee, Rachel and even Emma (assuming she gets her powers back and if not -- she can still fight something fierce.)