THEORY ABOUT WHAT THE WILL OF D COULD BE.
After the recent One Piece chapter 906 I think the Will of D means "Will of Dethrone". Hear me out first.
The Will of D was mentioned a lot and was backed by sources; Nico Robin, Trafalgar Law and Donquixote Doflamingo. The Will of D is significant and important. Anyone who posses the D in their name or are the D-bearer are fear by the people, mostly by the World Government. The D clan originate from the Ancient Kingdom.
The Ancient Kingdom were the first ruler of the Blue Sea and they were dethrone by the 20 kingdoms. The 20 kingdoms formed an alliances into the organisation known as the World Government. The World Government fought the Ancient Kingdom due to the Ancient Kingdom's ideal on freedom, peace and unity. The AK created the Ancient Weapons: Poseidon, Pluton and Uranus to fight back the WG or have a purpose for later on. However the WG won and stripped the AK from power and authority. The WG even used AK's own weapon against them.
The WG used Pluton to destroy the AK and cause the flow of molten lava from undersea to created the Red Line and trapping the AK within the Red Line. The Blue Sea was a planet covered with oceans and islands. The Red Line formed the Grand Line and Calm belt in equator with the help of Poseidon and Uranus and divide the Sea into North, South, East and West Blue. Pluton created the Red Line, Poseidon created the ocean current within the Grand Line and to let Sea Kings reside in the Calm Belt and Uranus cause the ocean weather to be hectic and chaotic.
After the defeat of Ancient Kingdom, the World Government built Mary Geoise/Mariejois on top of the Red Line in centre of the world. They now rule the world in replacement of the Ancient Kingdom. They covered up and forbid anyone finding the truth about what the 20 kingdoms (WG) did. The WG later created Marines, WG agents and Cipher Pol to monitor the world.
Once Luffy and his crews reach Raftel and defeat Blackbeard and claiming for the title of Pirate King the Strawhat Pirates will find the Rio Poneglyphs and the world will shake. The truth of Void century will be expose and the WG and Celestrial Dragon will fear their fall in power. The SH and their alliances will destroy the Red Line with Pluton thus destroying Mary Geoise as well. The SH will fight the Gorosei and WG on the sea. The Final War (World War 3) begin. The last piece of the puzzle will be complete. Red Line, Mary Geoise and Fish-Man Island will be destroy by Pluton. Poseidon ordering Sea Kings to carry Noah with all the Ryugu Kingdom citizens up from Fish-Man Island (Joy Boy's forgotten promise) and Uranus disabling the chaotic weather in the Grand Line and putting normal weather system back in place. Basically reverse-engineer the Ancient Weapons (since the WG used it to destroy AK and created the Red Line). The All blue will return once again and peace will be restore in the Blue Sea. The Strawhat Pirates and Alliances dethrone the Celestial Dragons and WG from power. No more corruption, slavery and seperation. One Piece is the pieces of jigsaw and once all pieces fit as whole, it becomes the One Piece (complete jigsaw).
Comments