It was probably chosen so that amazing douchebags on the Internet could create that hllarious picture with Lightning at Gamestop. Love that picture. --- "And you have proved to be A real human being and a real hero..."
Persona>Final Fantasy would be more accurate. I haven't played many SMT games yet to come to that conclusion.
I haven't played it yet, but I doubt any Persona game would be better than Nocturne. --- "The only thing that gets me high is the musky scent of my enemy's fear.'' - Stephen Colbert http://s1136.photobucket.com/albums/n496/Elice_Carol/
As much as I like Light, naming the 3rd game after her seems unnecessary as I was never under the impression that she was entirely absent from XIII-2.
As for why it is Lightning Returns: Final Fantasy XIII...well it's obviously supposed to incite some sort of whoop, she's returning as a playable character, but they never really gave her enough time to flourish as one.
As I say I like her, but I can't deny that it seems like they are whoring her out. --- Live thine life, as thou seest fit.