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 Ancient Weapons: Astronomy, The real source
    Moons of Pluto, Uranus and Neptune are the inspiration for Ancient Weapons - by CAMUNAI
    Updated: Jul 27, 2017
  2. Theory Journey to Uranus :Winged Race
    4th Ancient Weapon -Devil fruits origins & Secret of Yami Yami no mi - by Dave
    Updated: Mar 28, 2017
  3. Theory Fairy chess in Totland's arc and what could await us (plus Harry potter and Alice)
    Conections between chess games,the current and future arc - by CAMUNAI
    Updated: Jul 15, 2017
  4. Theory Will of D -2 :Truth of Mariejois
    Darkness of World Govt - by Dave
    Updated: Jun 12, 2017
  5. Theory Elbaf, Enel and the Norse Mythology
    Connecting the Norse Mythology with the series (857+). - by Aloe Vera
    Updated: May 11, 2017

View All Featured Theories & Speculations

  1. Theory Skypiea, Impel Down 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.
  2. Theory Dragon, His fruit is...?

    What the evidence says concerning Dragon's fruit type
  3. Theory Devil Fruits Complex Mechanism (Part 01)

    Explaining Devil Fruit's Nature, Origins and Awakening
  4. Speculation Oda's Path in the Snow

    Predicting the Events of 2017 with Deliberate Color Page Clues
  5. Speculation The Echo Of The Pirate King - The Man Roger Is Waiting For

    Roger left behind his voice on Raftel for Luffy to hear.
  1. Theories & speculations are being shown from all child categories.
  2. thabo Motaung

    Speculation What is a Pirate King or Takes To Be One

    Rodger attained wealth,Fame and power and everthing the world had to offer
    3/5, 1 rating
  3. Hithere
    4.42857/5, 7 ratings
  4. Dr. Ug P. Usher
    2/5, 2 ratings
  5. CAMUNAI
    4.55/5, 20 ratings
  6. Kaido Jr.
    0/5, 0 ratings
  7. shaddowkhan
    0/5, 0 ratings
    Updated:
    Aug 10, 2017
  8. Cailev
    3/5, 4 ratings
    Updated:
    Aug 8, 2017
  9. Nessos

    Speculation Paramecia Types and possible Awakening

    Awakening opens the barriers of Paramecias and grants the user a whole new world of possibilities!
    5/5, 9 ratings
  10. Legendary Po

    Theory [Revised] History of Void Century and Origin of DF or Uranus!!

    How Devil fruits were to came to existence and truth behind Devil Fruits SEA weakness!!
    4/5, 2 ratings
    Updated:
    Aug 7, 2017
  11. Portgas D. Xatch

    Theory Dissecting Devil Fruits... Why won't this Cut? Looking at the Bara Bara no Mi

    D.D.F. Looking at Buggy's potential, and a little EoS speculation...did someone say W.S.S.? (I did)
    4.14286/5, 7 ratings
    Updated:
    Aug 6, 2017
  12. Gladius Dark Star
    4.33333/5, 3 ratings
    Updated:
    Aug 5, 2017
  13. AnonymousStrawHat
    4.4/5, 5 ratings
    Updated:
    Aug 3, 2017
  14. TallGlassofAlmondMilk
    3.33333/5, 3 ratings
    Updated:
    Aug 1, 2017
  15. Ceies

    Theory Whole Cake Island 2.0

    My ideas for the second time against Big Mom; and how WCI 2.0 could break the system.
    4/5, 1 rating
    Updated:
    Jul 31, 2017
  16. BusoKokaLeg
    2.8/5, 5 ratings
    Updated:
    Jul 29, 2017
  17. thabo Motaung
    3.5/5, 4 ratings
    Updated:
    Jul 28, 2017
  18. thabo Motaung
    3/5, 3 ratings
    Updated:
    Jul 28, 2017
  19. CAMUNAI

    Theory Ancient Weapons: Astronomy, The real source

    Moons of Pluto, Uranus and Neptune are the inspiration for Ancient Weapons
    4.97561/5, 41 ratings
    Updated:
    Jul 27, 2017
  20. Goku D. Luffy
    1.72727/5, 11 ratings
    Updated:
    Jul 27, 2017
  21. Druid Hood

    Theory Is Elbaf Changing?

    A good theory about Elbaf from a forum that recently died but this needs to live on
    4.5/5, 2 ratings
    Updated:
    Jul 26, 2017
  22. VergoManiac

    Speculation Void Century UNLOCKED by VERGO

    void century,ancient kingdom,poneglpyh origin
    3.4/5, 5 ratings
    Updated:
    Jul 26, 2017
  23. Marq Hogans

    Speculation Is Pudding setting up the Big Mom Pirates for their downfall?

    Pudding seems to be helping in the BMP biggest time of need... or is she setting them up?
    4.71429/5, 7 ratings
    Updated:
    Jul 21, 2017
  24. Mahmoud Atia
    2/5, 3 ratings
    Updated:
    Jul 21, 2017
  25. ToBeThriller
    3.4/5, 5 ratings
    Updated:
    Jul 20, 2017
  26. Charlotte Crunch

    Theory The four former Bounty Hunters – Zoro's toughest fights

    The four strongest Bounty Hunters of West Blue, North Blue and South Blue. Their identity and role.
    3.8/5, 5 ratings
    Updated:
    Jul 20, 2017
  27. Pranav S
    1.5/5, 2 ratings
    Updated:
    Jul 20, 2017
  28. Luffy The King

    Speculation Ancient weapons

    Hi guys this is a theory about ancient weapon uranus
    2/5, 2 ratings
    Updated:
    Jul 19, 2017
  29. Puma D. Luffy
    0/5, 0 ratings
    Updated:
    Jul 19, 2017
  30. Donal D. Trump
    4.375/5, 8 ratings
    Updated:
    Jul 18, 2017
  31. WhereDreamersGather

    Speculation The Origin of Piracy in One Piece

    How the first generation of Pirates came about and who were they
    3.66667/5, 3 ratings
    Updated:
    Jul 18, 2017
  32. Balroz

    Speculation Madam Shyarly's prediction

    Tamatebako is the trigger for fishman island destruction
    3/5, 1 rating
    Updated:
    Jul 18, 2017
  33. Monkey D. MOK
    3/5, 3 ratings
    Updated:
    Jul 18, 2017
  34. RikuD
    2/5, 2 ratings
    Updated:
    Jul 17, 2017
  35. Swagtolomeo

    Speculation Will Big News Morgans go to Wano?

    Will Morgans follow the Strawhats to Wano because of the big news they gave him in Whole Cake?
    3.25/5, 4 ratings
    Updated:
    Jul 17, 2017
  36. TMWRS

    Speculation The "Forgotten" War

    The hundred year war that led to the fall of the Ancient Kingdom
    4/5, 3 ratings
    Updated:
    Jul 17, 2017
  37. JBurns__
    1.33333/5, 3 ratings
    Updated:
    Jul 17, 2017
  38. AnonymousStrawHat
    4.5/5, 4 ratings
    Updated:
    Jul 17, 2017
  39. Kneegrow991
    3/5, 1 rating
    Updated:
    Jul 14, 2017