How about a morowindesque (has anyone played that game morrowind?) extremely free roaming game. Where you can chose who and what you are, and how you go about the main quest along with multitudes of small quests. I was thinking heaps of exploration and character development type game. And classic stat heavy, item hunting fun.
I also have an idea for a story.
Setting: The Quartet. There are 4 cities at each corner of the world along with multitudes of towns.
Main quest: Every baby born into this world is assigned a god to watch over them, who they pray to at birth depending on their birth date. Those who dont have gods watching over them are "godless" and are cast out or killed. Pandora (working name) is one such person. She was born to uncertain parents and was found washed up on shore (other ideas?). Having no god she was cast out into the winderness in the center of the quartet. There she grew up, shunned by humanity, godless and alienated. With no kin, no home, no identity. So she makes an identity for herself. She vows upon her own “Never more shall I be cast away, the world will pay”. She then hones her inert powers (magical, channeling) and topples the emporers of the world and systematicly breaks the work apart. And out of the ashes and rubble and memories rises Fey. The greatest hero of all.
You play as Fey in this fantasy, post apocolyptic world.
Thoughts? Its a bit rough around the edges as its all off the top of my head, allthough i think its a good idea.