Afternoon all,
Dream, to answer your question it will be original characters though you can of course weave your origin/backstory in with existing heroes, villains, or places/environments in the setting.
And, yes, with the response here I will open up the game for submissions. There is a guideline post visible to all, I’ll include a link to the game below. After I see how many we get I will determine if I need to put up a wanted ad. See you guys/gals over there.
link to another game