Can't really tell, I'll have to think about that one. But as soon as they told Saul that he had a sniper rifle cleaning kit in there, I figured that Quinn might be there to take out Brody, should Brody be suspected or revealed to be playing the CIA. A sort of last resort guarantee.
I actually expected this episode to be Brody and Abu Nazir centered, with the two of them sitting across each other, trying to figure out the other guy. But it's kind of cool that we don't really know what they talked about or what will come of their meeting. I don't trust Brody's loyalty at all. He could be playing Carrie&co exactly as devised by Nazir, or Nazir is playing Brody, feeding him info that seemingly sends them on a false trail, believing they've stopped the actual terrorist attack and not just a sly deception. I'm betting the 'real' attack is still 'out there'.
A whole week until the next one, dammit