Well loners make sense given it's like a self help group and I could see him being court ordered or something to go.
NW if he's still running, although I see this the least likely.
NA would be cool, but we all know bendis would just make him white noise like spider-man.
Thunderbolts would be cool as well. He's not as bad as most of the group but he'd bring in some comedy and kind of be a character in the middle of the "bad" and "good" members of the team.
GLA would be pretty cool as well. I'd like to see him an SG interact.