Agreed^ Noel should come before Sazh, considering he was the one who Inadvertedly killed Etro thanks to Caius and started all of this. But to be fair, Caius is the real one to blame for this.
I hope he's in some sort of leadership position, I mean Snow is of all people. Fang is (That makes more sense there) Vanille is apparently being Worshiped, Hope kind of has his own thing going and led a faction in XIII-2, and well, Lightning is the saviour, I hope The Sahz has a solid job.
I doubt Sazh will be in a leader position. I mean look what position Noel and Serah are in, and THEY WERE THE MAIN CHARACTERS OF THE LAST GAME. They got s*** for positions now. Noel's a bounty hunter who's ruthless, and Serah's DEAD and if Lightning doesn't save her AGAIN, she's gonna be erased forever by Bhunivelze when the world ends.
But who knows, maybe he'll get a good position. Im just sad that Noel and Serah got crap positions compared to the original 6, since i actually like them more then the original XIII cast.