You got a LOT of work to do then.
You have to consider real-world countries, whether magic is a thing (and if it is, is it secretive? Because secretive magic creates a TON of plot holes), figuring out reasonable ways for characters to get powers, and you ESPECIALLY have to build a good supporting cast for your characters.
Like, seriously. Everyone forgets that supporting casts are essential for superheroes, instead focusing solely on battles, and after a while that gets boring.
Also, how is the technology? Is it advanced, or is it how current technology is? What about political strife? Police? Society?
There's a lot to figure out.