I'm sure I can do that! Do you want ideas related to the story you have already, or completely new stuff? As for backstories, I think I'd need to know about the background of the game's world. Since you said backstories instead of new characters, is it safe to assume you've made personalities and appearances for characters already? One last thing, this is just a side note really, but I have a tendency to word things really weirdly without noticing, so if anything I say doesn't make much sense, just ask me to reword it.
