This is pretty much a place to come for some of my ideas for story games you can use. I'll keep posting for a while. I think.
First couple ideas:
transformers story game. I to write one but couldn't get it right. I suggst tying together several series. try putting together the first generation 80s transformers the newer movies and transformers prime. I suggest researching the topic as well. Maybe in an advanced form? With items and classes?
Band story game. Could be pretty good.
Famous game. Be famous and stuff.
these are all my ideas so far. Feel free to use any of them. Send me a message if your going to use them. Also put me down as co-author if you do use them.