This game having a sequel would probably be fine. (SPOILER)Necron IS eternal, after all. It doesn't exactly have a cliffhanger ending like FFVII, but you could easily do more with those characters. Plus, it'd be interesting to see who returned as a playable character. Having more time to play as Beatrix would be fun, and maybe even Lani would join up.

Ahh, who am I kidding? It'll never happen... And if it does they'll just mess it up....