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 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 Journey to Uranus :Winged Race

    4th Ancient Weapon -Devil fruits origins & Secret of Yami Yami no mi
  2. Theory Dragon, His fruit is...?

    What the evidence says concerning Dragon's fruit type
  3. Speculation Oda's Path in the Snow

    Predicting the Events of 2017 with Deliberate Color Page Clues
  4. 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. Rej Discussions
    5/5, 6 ratings
  3. Aditya Sayyaparaju

    Speculation Will we see Absalom again?

    Ive got a strong feeling absalom is in WCI and will be critical in the transition to Wano
    2.66667/5, 3 ratings
  4. G_Da_Jungle_King
    4/5, 2 ratings
  5. Loopin face

    Speculation Mental illness an overarcing theme in WCI

    a prevalent theme of continued familial mental health issues from Big Mom's lineage
    3.75/5, 4 ratings
  6. Pandamonium

    Speculation The one who's forgotten

    Ceasar has been overlooked as of late. I believe he will re-enter the current story fairly soon.
    3/5, 2 ratings
  7. GangMemberLeo
    2/5, 2 ratings
  8. Timmy
    2/5, 3 ratings
  9. Sultan88
    3.6/5, 5 ratings
    Updated:
    Jan 14, 2018
  10. HisashiGojira
    2/5, 1 rating
    Updated:
    Jan 14, 2018
  11. FirstCommanderTheorist

    Theory The Cake that will Send Big Mom to Heaven

    The cake that is so delicious it will send Big Mom to heaven... literally
    4.5/5, 4 ratings
    Updated:
    Jan 13, 2018
  12. FuturePirateKing
    3/5, 2 ratings
    Updated:
    Jan 13, 2018
  13. Vandenreich
    5/5, 12 ratings
    Updated:
    Jan 13, 2018
  14. AnonymousStrawHat
    5/5, 2 ratings
    Updated:
    Jan 11, 2018
  15. Kensei
    4.75/5, 4 ratings
    Updated:
    Jan 11, 2018
  16. Charlotte Horchata

    Theory Red Line is a man-made wall and Oars assembled it.

    The Red Line is a wall created by Oars to imprison the enemies of the World Government.
    5/5, 2 ratings
    Updated:
    Jan 10, 2018
  17. Capt_NakedPanda
    5/5, 4 ratings
    Updated:
    Jan 10, 2018
  18. Rej Discussions
    4/5, 1 rating
    Updated:
    Jan 9, 2018
  19. AnonymousStrawHat
    0/5, 0 ratings
    Updated:
    Dec 10, 2017
  20. TDDashie

    Theory The Two Forms of the Moon Lion

    There are two versions of the Moon Lion, and we've already seen them both.
    5/5, 1 rating
    Updated:
    Dec 10, 2017
  21. D Rayo

    Speculation The 3D Map

    The Road Poneglyphs contain a 3D map Not a 2D map
    5/5, 1 rating
    Updated:
    Dec 9, 2017
  22. Tokiro Oumaga

    Theory The Pride of the Minks - The Lion's Mane

    Carrot's new form provides new information on an old theory of mine
    4.8/5, 5 ratings
    Updated:
    Dec 8, 2017
  23. NONSENSENAP2
    4/5, 1 rating
    Updated:
    Dec 6, 2017
  24. Okamakama

    Theory The Ending of Whole Cake Island.

    Whole Cake Island is repeating BM's most traumatic experience.
    5/5, 16 ratings
    Updated:
    Dec 6, 2017
  25. Purgy
    5/5, 3 ratings
    Updated:
    Dec 4, 2017
  26. Tral

    Speculation Inspirations playing a bigger role - the next big theft

    A speculation/theory about how the 3th poneglyph will be obtained by the StrawHats
    4/5, 1 rating
    Updated:
    Dec 3, 2017
  27. Rej Discussions

    Theory Joy Boy Mega Theory - The four kingdoms!

    Lifting the truth behind the ancient kingdom. Basing the future Nakama on it!
    5/5, 4 ratings
    Updated:
    Dec 2, 2017
  28. Randomite
    5/5, 1 rating
    Updated:
    Dec 2, 2017
  29. Echi
    3.33333/5, 9 ratings
    Updated:
    Dec 3, 2017
  30. g2zach

    Speculation LAFITTE SAVES POUND

    Lafitte infiltrated the big mom pirates as a sea lion to steal devil fruits
    3.6/5, 5 ratings
    Updated:
    Dec 2, 2017
  31. Sniper king ussop
    4/5, 1 rating
    Updated:
    Nov 30, 2017
  32. Steins;Gate

    Theory The Concept/Purpose of Rokushiki

    The Rokushiki are the WorldGovernment's way of Preparation for Haki.
    4.25/5, 4 ratings
    Updated:
    Nov 29, 2017
  33. SamEarl13

    Theory Will Carrot Fight Daifuku?

    The moon rabbit idea is good but I don't think it'd be Katakuri attacked.
    3/5, 5 ratings
    Updated:
    Nov 29, 2017
  34. Lordnib
    4/5, 2 ratings
    Updated:
    Nov 28, 2017
  35. Misle D Dawn
    3.33333/5, 3 ratings
    Updated:
    Nov 27, 2017
  36. lady
    2/5, 1 rating
    Updated:
    Nov 27, 2017
  37. salx37
    4.2/5, 5 ratings
    Updated:
    Nov 20, 2017
  38. Edward Teach
    3.66667/5, 6 ratings
    Updated:
    Nov 20, 2017
  39. AnonymousStrawHat

    Theory Huge Connections-Bible, Pokémon, and One Piece!

    Bringing back an old theory because the pictures failed and they're crucial.
    4.5/5, 4 ratings
    Updated:
    Nov 19, 2017
  40. bennett067958
    1/5, 1 rating
    Updated:
    Nov 17, 2017
  41. thabo Motaung

    Theory Implication of Big mom eating the weeding cake

    The implications of big mom eating the wedding cake and her crew as well as her territory
    5/5, 1 rating
    Updated:
    Nov 17, 2017