Well, actually, I remember when I beat Necron, he said stuff when he was dying, and it made me think, "SEQUEL!" So maybe he's like SIN in that he revives himself.

As long as they wouldn't change anybody characters, then that's fine. Also, Vivi's kids could be playable or some kinda summon since they can't have you playing as Vivi. Or, they could have Beatrix as a playable character, I mean, more than a guest. I dunno. Going to Gaia's other moon would be cool since it's still there, I think.