The closest thing to that seems to be Bendis' Superman post-Unity Saga.
spoilers:end of spoilers
You see, Clark is apparently going to be elected the first President of Earth. As we know, that means him dealing directly with the fledgling UP. Funny enough, Bendis seems to have been inspired by Johns' Superman and the Legion of Super-Heroes because Dawnstar and Wildfire explain to Clark that he help broker peace deals and negotiations that lead to the United Planets. And since Superman, Supergirl, and Superboy directly say that will be part of the UP's deal, it seems like we'll be getting some of that. Plus, Superman is supposed to the the "cosmic" book out of Bendis two Superman related titles, so likely expect it to regularly come back to the new UP. We're likely to even get the UP embassy in Metropolis.