Re: Champions Background Information
Nothing.
From everything I've been exposed to in 30+ years of gaming, the game is defined by the system used. Not by the source of the background material.
I've used DC Heroes, Superworld, Marvel Super Heroes, Champions, Foundation, Enforcers, M&M, novels, comics, TV shows, movies, etc., to come up with characters and plot ideas for my game.
The game is Champions, using the Hero System.
The world I run started with 2e and has upgraded successively with each edition (until now) requiring only character conversion to the new rule set.