Now that Assassin's Creed Odyssey has ultimately wrapped all of its major story reveals, many are indubitably looking forward to the next Assassin's Creed title. Assassin's Creed 2020 will reportedly have a Viking setting, with many fans adopting the title, Assassin's Creed: Ragnarok. Assuming that the subtitle is legitimate, this not only ties back into Viking mythology, but could have major implications for the future and modern story. With Odyssey's emphasis on the Staff of Hermes Trimesgistus, it seems likely that its specific role, as well as other recently featured pieces, could have a major impact on the next game.
However, given the long-running history of the franchise and the ever-present war of the Templars and Assassins, it can be hard to know which faction holds what. This is even further complicated by the extensive history and lore of the various Pieces of Eden in Assassin's Creed, which include the Apples of Eden, the Swords of Eden, the Staves of Eden, the Shrouds of Eden, the Spear of Leonidas, the Koh-i-Noor, the Trident of Eden, and the Precursor Box. Each has passed hands several times over the years, but here's the current location of every known Piece of Eden.
Apples of Eden
Probably the most well known Piece of Eden, prevalent in a number of entries, is the Apple of Eden. They were design to project mind-controlling illusions, manipulate physics and create tangible holograms, manipulate and imbue energy, conjure curses and turn many invisible, and negate the effects of the Staves of Eden. There are multiple apples, with 9 currently known about in Assassin's Creed lore.
Of those 9, there are 4 currently in unknown locations and 2 that have been destroyed. There's also 1 in the possession of the Templars, and another in the possession of William Miles. The final Apple of Eden is currently in the hands of Callum Lynch, the Michael Fassbender character from the 2016 movie.
Swords of Eden
The Swords of Eden were created when humanity rebelled against the Isu, and as such, are some of the most powerful Pieces of Eden currently out there. They ignore illusions created by the Apples of Eden and grant users latent charisma and leadership skills. It can actively transport its wielders and foes and project powerful energy blasts.
The Sword of De Molay, the one used in Assassin's Creed Unity, is currently being held by Abstergo Industries in London. There are 3 other swords, though, but none of their current locations are known. One was last seen in the possesion of Genghis Khan, One was last mentioned to be used by Perseus, and the Sword of Damokles -- wielded by Deimos in Assassin's Creed Odyssey and later by their sibling -- has seemingly been passed on.
The Staves of Eden/The Staff of Hermes Trismegistus
Typical Staves of Eden can conjure illusions, control human minds, grant invisibility, and open Temple Vaults. There are currently 4 known-about Staves of Eden, including the oddball out: The Staff of Hermes Trismegistus. This staff stands out as it gives the wielder immortality for as long it is held, and its powers will still likely play a role in Assassin's Creed 2020.
One staff is destroyed, and the staff wielded by Alexander the Great is currently lost, though hints may suggest it is somewhere in Afghanistan. There is one staff hidden inside the Vatican Vault, from the events of the Ezio trilogy, and of course, the Staff of Hermes Trismegistus is currently being held by Layla Hassan.
The Shrouds of Eden
The Shrouds of Eden were originally created by the Isu Consus and gave users regeneration and healing, with it even being known to induce the Bleeding Effect. The original Shroud has been destroyed, but a second is currently in possession of the Templars.
The Spear of Leonidas
The Spear of Leonidas, which featured heavily in Assassin's Creed: Odyssey, is currently being wielded by Layla Hassan.
The Koh-i-Noor
The Koh-i-Noor is, without a doubt, the most powerful Piece of Eden on this list and could have a ton of destructive potential in future franchise entries. Not only can it track Pieces of Eden, but it can bind them together, combining and amplifying their already incredibly powers. It is said that its power can only be wielded by God or women, and it was last seen in the hands of Elijah, Desmond's son, following the events of Assassin's Creed Uprising.
The Trident of Eden
The Trident of Eden was used alongside his staff to create Alexander the Great's Empire, but after his death, it was divided into 3 and spread far and wide. Eventually, it came into the modern possession of Sebastian Monroe, a minor Assassin's Creed character who believes both the Assassins and Templars are wrong and was a research of cross-generation Ascendance events.
The Precursor Box
The Precursor Box (or boxes) allows wielders to siphon artifacts for power, read Isu writing, and imprint memories. There's somewhat of an inconsistency here, with some thinking that there is only 1 box but others thinking there are 2, but what is for sure known is that there is one box in possession of Alvaro Gramatica, the Director of Research of the Future Technology of Abstergo Industries.
Assassin's Creed 2020 is rumored to be in development.