Is Superman a DC or Marvel?

Related questions

1. Does Marvel and DC come together?
2. Who would win DC Universe or Marvel?
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5. How many Marvel DC movies are there?
6. What is DC means in Justice League?
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Tags

1. #never
2. #comics
3. #years
4. #created
5. #universe
6. #cinematic
7. #standard
8. #appear
9. #movie
10. #superman
11. #superheroes
12. #featuring
13. #characters
14. #marvel
15. #since
16. #modern
17. #character