Looks like its using Chrono Cross's main theme of what happens when you change history, though in this case it's Etro's fault instead of your party, kinda weird they seem to have dropped the whole Fal'Cie/l'Cie element that was the defining plot element of the original game. The gameplay sections look much better but I have zero interest in the plot since I hate XIII's cast and my fave character has at most in the entire XIII-2 promo period only been seen in the new extended XIII ending and that one shot of him with his son in the trailer, makes me think he's going to have a very very minor role in the plot instead focusing on the new characters and Lightning mostly, with Hope and Snow now getting supporting roles.