Do I have to buy all WoW expansions to play Legion?

Related questions

1. What is the level cap in World of Warcraft?
2. Are you only allowed one demon hunter?
3. Do demon hunters start at level 1?
4. What level can I make a demon hunter?
5. What level can you play WoW for free?
6. Does Battle of Azeroth include Legion?
7. Who killed Illidan?
8. Can I buy BfA without Legion?
9. Do I need to buy Legion before Battle for Azeroth?
10. Do you have to buy legion to play Demon Hunter?

Tags

1. #mists
2. #warlords
3. #there
4. #original
5. #continue
6. #battlechest
7. #purchase
8. #except
9. #rolled
10. #wrath
11. #thanks
12. #expansions
13. #legion