Now onto what this thread is for; making your characters. The one ironclad rule I have for this setting is: no clerics, or anything resulting from a direct divine connection giving you your powers. Anything else is fair game, and I do mean anything. PHB material, character options from any of the other official books, Unearthed Arcana articles, maybe even homebrew material if you can give me a really good case for it.
Also important to know is that this setting at the start does not have magic. This won't stick the entire time, but initially everyone is normals(psionics excepting). That isn't to say you can't start as a caster class or with stuff that gives you magic, but you'll just have to wait a bit to use it.