So, right now, I'm looking to make a solo campaign with a friend of mine. Normally I don't run solo campaigns, but at the moment have nobody else to play with.
My thoughts are on a Green Lantern/Nova Corps type character (possessing a highly powerful quasi-mystic/sci-fantasy artifact) but I want to shake it up a bit. I want to do a bit of a cross with the concept behind Exiles as well, so the character will be traveling through time and space, across parallel worlds, dealing with the unknown at every turn... I just can't quite figure out the hook to the story. I'm not sure if I want the character to be a member of a large force like the GL/Nova Corps, or the torchbearer to a group that was destroyed, like Kyle Rayner.
Also, for the settings, characters, and threats, would purchasing the cosmic handbook be helpful?