One Piece (Series & Plot)

Theories under this category are related to the main plot and the series as a whole.

Top Theories/Speculations

  1. Theory Big Mom's Strongest - The 'Sweet Commanders' POWERS AND IDENTITIES
    In depth theory talking about who i believe to be the 3 sweet commanders and their powers. - by Joy_Boy
    Updated: Oct 11, 2016
  2. Theory The Extraterrestrial Origins Of The Ancient Kingdom & Celestial Dragons Revealed (Part 1)
    I believe that the Ancient Kingdom & 20 Kings both originated from the moon, "Fairy Vearth". Part 1. - by Saffron Kaizoku
    Updated: Aug 19, 2016
  3. Theory Purin is Yandere?
    Answer to if purin good or evil - by Dave
    Updated: Nov 6, 2016
  4. Theory Skypiea, ID and Blackbeard inspired by Dante's Divine Comedy (Bonus: Blackbeard's future DF)
    A theory that explains Skypiea, Impel Down and Blackbeard's connection to Dante's Divine Comedy. - by Mr. Tiddles
    Updated: Jan 14, 2017
  5. Theory 5 HORSEMEN OF ONE PIECE
    symbolism and foreshadow of horsemen and anti Christ in one piece - by Dave
    Updated: Sep 9, 2016

View All Featured Theories & Speculations

  1. Theory The Extraterrestrial Origins Of The Ancient Kingdom & Celestial Dragons Revealed (Part 1)

    I believe that the Ancient Kingdom & 20 Kings both originated from the moon, "Fairy Vearth". Part 1.
  2. Theory Dragon, His fruit is...?

    What the evidence says concerning Dragon's fruit type
  1. Theories & speculations are being shown from all child categories.
  2. DeathWink
    1.5/5, 2 ratings
  3. gfunkdaddy
    3/5, 1 rating
  4. HabibAllah
    4/5, 3 ratings
  5. Cockycent
    0/5, 0 ratings
  6. gfunkdaddy
    5/5, 3 ratings
  7. gfunkdaddy
    5/5, 2 ratings
  8. gfunkdaddy
    5/5, 1 rating
  9. MUUGEN
    5/5, 3 ratings
  10. Legendary Po
    3.33333/5, 3 ratings
  11. 99cent Hitman
    0/5, 0 ratings
  12. jinz
    4.5/5, 4 ratings
  13. sEnkaaa
    3/5, 1 rating
  14. MUUGEN

    Theory Part II - Kozuki's Retainers & Kaido's Calamities

    Who the Calamities are based off of and possible Abilities of the Retainers.
    5/5, 4 ratings
  15. Icecream001
    3.625/5, 8 ratings
  16. MasterD
    4.88889/5, 9 ratings
  17. DeathWink
    5/5, 3 ratings
  18. L o g i a
    4.66667/5, 12 ratings
  19. Emperors Tier
    3.5/5, 2 ratings
  20. PaperFlower
    4/5, 2 ratings
  21. Mr. Tiddles

    Theory Skypiea, ID and Blackbeard inspired by Dante's Divine Comedy (Bonus: Blackbeard's future DF)

    A theory that explains Skypiea, Impel Down and Blackbeard's connection to Dante's Divine Comedy.
    5/5, 12 ratings
    Updated:
    Jan 14, 2017
  22. MUUGEN
    5/5, 3 ratings
    Updated:
    Jan 14, 2017
  23. Doffy Mingo
    4.66667/5, 3 ratings
    Updated:
    Jan 13, 2017
  24. sEnkaaa
    3.33333/5, 3 ratings
    Updated:
    Jan 13, 2017
  25. donnaavr
    4.5/5, 8 ratings
    Updated:
    Jan 13, 2017
  26. Kracken D. Preston

    Theory /speculation- End of tottland arc/ Elbaf arc

    My Prediction on how Tottland arc will end and lead into the Elbaf arc after wano or further.
    4.5/5, 2 ratings
    Updated:
    Jan 13, 2017
  27. Onepiecefan9867

    Theory Big Mom and Kaido Sagas = Star Wars

    How the 2 emperors saga showes similarities to Star wars so we know what might happen in the future.
    4.5/5, 2 ratings
    Updated:
    Jan 12, 2017
  28. Lothar1399

    Theory Zunisha's path

    The walk for all eternity, could be a sign.
    4.75/5, 4 ratings
    Updated:
    Jan 12, 2017
  29. Legendary Po

    Theory History of Void Century and Origin of DF or Uranus!!

    This theory about how WG able to take down Ancient Kingdom. And other stuffs about ancient weapons.
    3/5, 1 rating
    Updated:
    Jan 12, 2017
  30. Naomi Rose

    Theory Mysteries Note On Punk Hazard/Totland Solved! Randolp Mysteries Connection to Crocodile!!

    damn you oda, The suspense, just let them join already! the wait!! Randolp connection to Crocodile!
    3.66667/5, 9 ratings
  31. pandaman429

    Theory Wano and Japanese History

    Some context behind the comparisons to historical figures rumored to be paralleled in the Wano Arc
    5/5, 1 rating
    Updated:
    Jan 12, 2017
  32. Ascaisil

    Speculation A million random things

    Several different questions about miscellaneous things in the series that may or may not be related.
    5/5, 2 ratings
    Updated:
    Jan 12, 2017
  33. Ascaisil

    Theory Ancient Kingdom Imbuing power theory

    The Kingdom of D, Ancient Weapons, and the Void Century combined theory
    5/5, 4 ratings
    Updated:
    Jan 12, 2017
  34. RubberGawdLuffy
    1/5, 1 rating
    Updated:
    Jan 12, 2017
  35. Kouhei

    Theory After the One Piece - The Dawn of the World

    Especially about Oden's mission after they've reached Raftel
    0/5, 0 ratings
    Updated:
    Jan 11, 2017
  36. Kaizen360

    Speculation Wano arc = Whitebeard Pirates Revival

    Marco and the Whitebeard Pirates will rise again in the land of samurai.
    0/5, 0 ratings
    Updated:
    Jan 11, 2017
  37. Herr Krokodil
    4.76923/5, 13 ratings
    Updated:
    Jan 11, 2017
  38. VergoManiac
    3/5, 3 ratings
    Updated:
    Jan 10, 2017
  39. 99cent Hitman
    4/5, 2 ratings
    Updated:
    Jan 10, 2017
  40. DeathWink

    Theory End of Whole Cake Island Arc (Whole Cake Island Mega Theory)

    How WCI Arc will progress and end. Everything covered in this theory! *MUST READ*
    4.7/5, 10 ratings
    Updated:
    Jan 10, 2017
  41. Doffy Mingo
    3.66667/5, 3 ratings
    Updated:
    Jan 9, 2017