In May, Square Enix will release Requiem of the Goddess a downloadable Final Fantasy XIII-2 storyline where Lightning fights Caius. Square Enix made new paradigms just for Lightning’s one on one battle such as Blast Wizard and the special attack Aeroga Blast. There are new quick time events or Synchro Drives made for the fight.
Caius has new spells like Ultima and if you win a throne will appear before Lightning.
Serah will also be able to wear a White Mage outfit and Noel can get a Black Mage outfit if you purchase these costumes from PSN or XBLA.