Might be cool to create our 'setting bible' via consensus as done in the game
Spectaculars. That has a setting book which allows you to outline a few particulars and add more detail as needed. In one game we used it to create an alternate Detroit in which super-powered individuals were adored by the public, but despised by the police and hunted by the federal government. Was a darker street-level game by consensus, but there are enough options that almost any take on superheroics is possible.
Sentinel Comics characters scale pretty well to any power level.
Spectaculars Setting Book: The Basics:
Before playing your first issue, fill out the information on these two pages to lay out the basic nature of your setting. You should answer as many questions as you can, but if you cannot come up with a suitable answer, it's okay to wait until later and fill it in when it matters. See p. 60 for more about using this book.
All Spectaculars settings begin with a city that serves as the heart of the setting. Each of the series pads begins in this city, and the majority of the action takes place there. Though your heroic adventures may take you to distant nations, alternate dimensions, and far-flung worlds, the setting revolves around this city and the heroes and villains within it.