Why Batman is the most popular superhero?

Related questions

1. Who is better Superman or Batman?
2. Who can beat Batman?
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4. Did the Joker die?
5. Who is the baddest superhero?
6. Who would win Superman or Thor?
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Tags

1. #production
2. #comics
3. #contents
4. #batman
5. #superhero
6. #superman
7. #mature
8. #resonates
9. #because
10. #reason
11. #teenagers
12. #action
13. #audience
14. #popular
15. #never
16. #children
17. #human
18. #first
19. #appeared
20. #since