so do u guys even know what the story of FFXIII-2 is even about?!?!
check it out, I'ma break that shyt down to u;
basically after the ending sequences of xiii, there's a mini earthquake that breaks the ground, sucks Lighting into it, and transfers her to another dimension or time era or whatever...
in this alternate universe, there's a lot of fighting going on and Lighting being the fighter she is puts on some armor and thinks to herself Yes, This is where I will belong, this is my purpose.
while on the real universe, apparently nobody notices the earthquake and the ground has all healed itself up, leaving the cast of XIII to be all like
"where did she go?!?!"
and basically, this justifies a sequel.