These are the areas you should research:

1. Background and History

2. Strengths and Weaknesses

3. Other Characters

4. Main Villain

Here are some good places to start:

Superheroes at Wikipedia. (information)

International Heroes. (information)

Black Heroes. (information)

Superhero Universe. (information)

Manga. (information)

More Manga. (information)

Superhero Database. (information)

Good luck!