Because of production costs, AMC has supposedly asked for a shorter season — six or eight episodes versus the traditional 13 shows. The creative forces behind the series have balked at that idea and Sony was rumored to have sent out feelers out to other cable outlets about possibly taking over the show.
TheWarp reports that Sony did indeed solicit interest and FX was one of the cable stations approached. The article also notes that a move for Breaking Bad is considered less and less likely as negotiations have been improving between Sony and AMC