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: Aug 31, 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 Elbaf, Enel and the Norse Mythology
    Connecting the Norse Mythology with the series (857+). - by Aloe Vera
    Updated: May 11, 2017
  5. Theory Will of D -2 :Truth of Mariejois
    Darkness of World Govt - by Dave
    Updated: Jun 12, 2017

View All Featured Theories & Speculations

  1. Theory Barbarossa and Shanks The Emperors

    The commonality between Emperor Barbarossa and Emperor Shanks.
  2. Theory The Marines interference foreshadowed and built up

    Punk Hazard foreshadowing // Kiku, Zoro, Hiyori and Tashigi // Law's deathflag // Luffy vs Sentomaru
  3. Speculation Nami's connection to Romanian lore and a bigger role to play in Wano

    Nami and her abilities may be inspired from Solomonars, Romanian weather wizards.
  1. Theories & speculations are being shown from all child categories.
  2. Saikō no Kenshi
    4.42857/5, 7 ratings
    Updated:
    Oct 21, 2018
  3. Saikō no Kenshi
    1/5, 6 ratings
    Updated:
    Oct 19, 2018
  4. Shishi Sonson
    4/5, 5 ratings
    Updated:
    Oct 19, 2018
  5. Speak123
    2.5/5, 2 ratings
    Updated:
    Oct 19, 2018
  6. MegaMaori
    2/5, 4 ratings
    Updated:
    Oct 19, 2018
  7. ToBeThriller

    Theory Zunisha's Crime! Noah, the Broken Promise, and Lady Toki!

    Zunisha failed at an important task assigned to it by Joy Boy himself! Why Momo can command Zunisha!
    4.25/5, 4 ratings
    Updated:
    Oct 18, 2018
  8. BKumafangirl67
    1/5, 1 rating
    Updated:
    Oct 15, 2018
  9. KayabaJ

    Speculation Is Robin a D. ?

    How can D. die and who is Robin's father
    2/5, 1 rating
    Updated:
    Oct 14, 2018
  10. Donal D. Trump

    Theory Let's reveal what the One Piece is once and for all!

    You know the answer already because you noticed it before but didn't put all puzzle pieces together!
    3.2/5, 5 ratings
    Updated:
    Oct 14, 2018
  11. Rajatdhanuka
    2/5, 1 rating
    Updated:
    Oct 12, 2018
  12. ImmaIvanoM

    Speculation Wano’s Strongest Samurai

    I think Wano is going to have its own version of Mihawk, and he won’t be on anyone’s side.
    0/5, 0 ratings
    Updated:
    Oct 8, 2018
  13. Donal D. Trump

    Theory Toki and her powers explained! Another piece of the big picture revealed!

    Lets explore how Toki's powers EXACTLY work and how she is connected to the void century!
    5/5, 5 ratings
    Updated:
    Oct 6, 2018
  14. princeAtlas
    4/5, 1 rating
    Updated:
    Oct 5, 2018
  15. Nesola
    3/5, 2 ratings
    Updated:
    Oct 5, 2018
  16. BKumafangirl67

    Speculation Time Travel

    What is the purpose of the Toki Toki no mi
    1/5, 1 rating
    Updated:
    Oct 4, 2018
  17. ImmaIvanoM
    5/5, 1 rating
    Updated:
    Oct 4, 2018
  18. Afromugen
    3/5, 2 ratings
    Updated:
    Oct 4, 2018
  19. Commando_Nate

    Speculation Luffy V Kaido 1 on 1

    Not much evidence to back this up wrote it on reddit.
    3/5, 2 ratings
    Updated:
    Oct 4, 2018
  20. Marco One Piece Theorist
    4.75/5, 8 ratings
    Updated:
    Oct 3, 2018
  21. Chaosceptor
    0/5, 0 ratings
    Updated:
    Oct 3, 2018
  22. Osama95

    Speculation Momonosuke after Wano

    What will happen to Momo and the rest after the events of Wano
    3/5, 1 rating
    Updated:
    Oct 2, 2018
  23. crate

    Theory The former owner of the Yami-Yami no mi

    Oden's Wife was the former owner of the Yami-Yami no mi
    3.88889/5, 9 ratings
    Updated:
    Oct 1, 2018
  24. sagingnik
    3.5/5, 2 ratings
    Updated:
    Oct 1, 2018
  25. Fujiman33
    0/5, 0 ratings
    Updated:
    Sep 30, 2018
  26. Ashim Goyal
    2.5/5, 2 ratings
    Updated:
    Sep 30, 2018
  27. Diamond .d Bucks
    3/5, 2 ratings
    Updated:
    Sep 28, 2018
  28. Coded Shinigami

    Speculation TIME TRAVEL DEVIL FRUIT..??? what a joke..

    Making some fusses about time travel, is this the first time Oda used it?
    1/5, 4 ratings
    Updated:
    Sep 28, 2018
  29. Artur

    Theory The Momo Who Leapt Through Time - The Ghosts of Wano Theory

    Attempting to prove that Oden died 20 years ago and that Momonosuke's group leapt 20 years ahead.
    5/5, 6 ratings
    Updated:
    Sep 27, 2018
  30. Sentinel

    Theory The Possibility of Time Travel - The victim of Oden Kozuki!

    A Theory about the current Wano arc and the possibility of time travel in One Piece
    4.75/5, 4 ratings
    Updated:
    Sep 25, 2018
  31. Charlotte Q Charlie

    Theory Oden and the Yurei Yurei No Mi - Ghosts of Wano theory

    An explanation on how Kinemon, Kanjuro, Raizo and Momonosuke are actually dead.
    1.5/5, 2 ratings
    Updated:
    Sep 23, 2018
  32. senjubeans
    4/5, 1 rating
    Updated:
    Sep 23, 2018
  33. senjubeans
    4/5, 5 ratings
    Updated:
    Sep 23, 2018
  34. Sanji W. Smoke

    Theory Momonosuke retained/Inherited Oden Memories.

    Voice of all things-D Clan-Kozuki Clan- Poneglypps- All Connected.
    4.5/5, 2 ratings
    Updated:
    Sep 22, 2018
  35. AG Es

    Theory Oden's Ability

    Momo and retainers were sent to the future
    4/5, 2 ratings
    Updated:
    Sep 21, 2018
  36. Wajay

    Speculation Next time skip

    From the wano kuni - a country lost in time theory
    0/5, 0 ratings
    Updated:
    Sep 21, 2018
  37. taty
    1/5, 1 rating
    Updated:
    Sep 20, 2018
  38. Nessos

    Theory Marshall D Teach, the necessary evil

    Was it only his awesome plan that let him rise from a nobody to a Yonkou within 2 years?
    5/5, 6 ratings
    Updated:
    Sep 18, 2018
  39. Saikō no Kenshi
    2/5, 2 ratings
    Updated:
    Sep 17, 2018
  40. Donal D. Trump
    3/5, 2 ratings
    Updated:
    Sep 17, 2018
  41. Zoro77
    1/5, 1 rating
    Updated:
    Sep 16, 2018
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