Choose a SETTING familiar to the PLAYERS and GM. Young Justice, Teen Titans Go!, etc...
Choose ORIGINS of SUPERPOWERS.
Choose IMPORTANCE OF SUPERHEROES. Does the Justice League exist? Are there Avengers or X-Men?
Choose a META PLOT for the campaign. (Battle vs. Hydra, Keeping 084s out of the Bad Guys hands, etc,,,)
Highlight one or two PLAYER SUB-PLOTS per session. (Hunteds, Watcheds, DNPCs, or something you liked about the character's story or something you know the PLAYER enjoys.Say Pirate themed Bad Guys for the Swashbuckler?)
This is usually where I start. The PLAYER's CHARACTER's run rough shod over anything more detailed. (The Bad Guys in my Champions of Vancouver campaigns were supposed to be VIPER, but a random mini series encounter with VOICE changed the entire campaign Meta Plot.
QM