It bugs the hell out of me putting sequels on consoles other than those of direct evolution (i.e. ps2 game sequel on PS3) because not all gamers are made of money. (admittedly I have a DSi but that's kinda the wrong style for XIII) If they did make a sequel I'd want it on PS3 and either about vanille and fangs first focus or say 100 years ish after the end of the game, see how humans are getting on and all. (SPOILER)Could start with fang and vanille coming out of crystal stasis and cocoon falling finally. That'd be pretty visually spectacular.

Admittedly I'm in no rush for a sequal, see what happens with Verses.