Making a superhero universe, ask me anything.

Im not sure if this is allowed. If not, please delete this, or tell me to, i dont know how this works.

Hi, I'm making a superhero universe, and I need help worldbuilding. I find that being asked new questions I NEVER thought of is a great way for me to expand my ideas. So thats what I'm asking. It can be a question of anything about my universe!

There is nothing special, like a consistent power source, or time period, or gimmick, to this universe, but if there was I would say... Thank you!