Since I am writing my own superhero, science fiction story with superheroes and super-villains, I figured I could help guide you through the same process. Remember that anybody is capable of having great imagination or able to come up with great ideas.
Things You Will NeedImagination, knowledge, media (movies, games, etc.), pen or pencil w/paper.
-Mutations/Biological Entities/Synthetic Entities
-Aliens with their laser guns (pew pew pew...just kidding)
-Out of control crime waves
-Your own conflict/threat?
Step 4Create the Characters. Of course no story is complete without the characters. I will create a separate guide for character creation since there is so much I can teach you about it. For now though, I want you to think about what kind of characters would fit into your world. As an example I want you to look at the picture of the four survivors from the video game Left 4 Dead. How do they fit into their zombie-apocalyptic filled world? Notice how rugged and worn out they look, both physically and mentally. How has their current predicament changed the way they operate or think?
Think of it this way...if a character comes from a rough environment, they will most likely wear rugged clothing or scavenged armor along with a tougher attitude. If the environment is cleaner then the characters are more likely to don tactical and more professional gear. Its all common sense really.
Remember that not every hero needs to be "super." Its just a typical title given to most heroic character nowadays. For example, Batman and the Punisher have no superpowers, yet they are considered superheroes.
If you ever need any kind of inspiration, I recommend watching superhero movies such Batman Begins or Iron Man. Playing video games can help give you some good ideas as well. Remember to be ambitious and always believe in yourself. Good luck!