Remember this guy? I think he was the first 2013 minifigure we heard about, yet we do not know who he is, yet.
I do not think any of us were expecting this, but Big Bang is a licensed theme with yellow minifigures. You heard that right. We have an image of one of the characters.
I am joking, but why don't we have a discussion for Big Bang? I do suspect it is a codename for something we already know of, though.