Is Fullmetal Alchemist Brotherhood a sequel or remake?

Related questions

1. Do Ed and winry have kids?
2. Will there be another Fullmetal Alchemist?
3. Did Edward lose his alchemy?
4. What comes first Fullmetal Alchemist or Fullmetal Alchemist Brotherhood?
5. How does Fullmetal Alchemist Brotherhood relate to the original?
6. Which one is better FMA or FMAB?
7. How many Fullmetal Alchemist movies are there?
8. Did Edward Elric get his leg back?
9. Will Edward get his alchemy back?

Tags

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2. #divergence
3. #points
4. #covers
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12. #which
13. #similar
14. #remake
15. #alchemist
16. #might
17. #neither
18. #influences
19. #watch
20. #brotherhood
21. #other
22. #sequel