See the question mark? That signifies that I am not positive about this one, unlike yesterday's promo definitely being the Beast.
In any event, Marvel has released the second Secret Avengers promo, and I think it is most likely Moon Knight. The shape works and the tagline fits (actually pretty damn perfectly, as the current Moon Knight series is ALL about Moon Knight seeking redemption). And why WOULDN'T Ed Brubaker want Moon Knight on his team? Moon Knight is awesome.
What's your bet?