The Assassin's Creed franchise has become well-known for its compelling narratives. The in-game lore is vast and complex, involving a wide range of characters and storylines across different time periods. However, such a vast canon inevitably comes with loose ends, unanswered questions, and plotlines that could benefit from greater attention. Sometimes storylines that seemed to be leading somewhere get put on hold or move into the background while the focus shifts elsewhere. Such plotlines can include loose ends, unanswered questions, underused characters, and even entire story arcs that never received a clear resolution. As a result, there are many aspects of Assassin’s Creed lore that have yet to be tapped for their full potential.
10 Juno's Wrath
The mysterious ISU race is a big part of the Assassin's Creed series, with one of the most prominent members being Juno. Whatever her goals and motivation, she seems to look down on humanity. She first became a danger at the end of Assassin's Creed III, when Desmond Miles released her from a digital prison to prevent the apocalypse. Black Flag revealed that she had access to Abstergo's network and John from I.T. (actually a clone of her dead husband) intended for her to possess the player's body. Juno later appeared in Syndicate, delivering cryptic messages to the player during a hidden level and speaking to Violet De Costa at the very end with an ominous promise to "save" humanity. Juno seemed to disappear after Syndicate, with Origins introducing a new storyline.
9 Layla's Relationships
Assassin's Creed: Origins introduced the modern protagonist Layla Hassan, moving away from the previous games where the player was situated as a character in the present-day.
One notable detail in the modern sections of Origins was Layla's relationship to her friend Deanna, which involved them referring to each other as "sweetheart" in Arabic-details that seemed to imply that the new modern-day protagonist is openly gay. This got the attention of many fans, but it was never explicitly stated in her first appearance and was never brought up again in Odyssey or Valhalla.
8 Missing Pieces of Eden
Assassin's Creed has introduced players to many "Pieces of Eden"- artifacts leftover from aliens that once ruled the world. The most iconic is the "Apple"- a spherical mind control device that doubles as a weapon of mass destruction-but there are others, some of which have not been mentioned since their first appearances. BlackFlag's story centered on the observatory, but it has not been seen since. Similarly, the whereabouts of the Isu sword featured in Unity have also not been made clear. Syndicate introduced the shroud of Eden with the implication that it was going to be used to resurrect Desmond Miles, a plotline that has also gone untouched.
7 Kassandra's Whereabouts
Assassin's Creed: Odyssey took Kassandra in an unusual direction compared to previous heroes- having her still be alive in the present day. She appeared at the game's end with the Staff of Hermes Trismegistus, an ISU artifact capable of halting the aging process and keeping a person alive beyond their normal lifespan. The staff reappears in Valhalla, but there is a much bigger question- what has Kassandra been doing since Odyssey? Kassandra would have been alive at the same time as every other Assassin's Creed protagonist. Where was she while Ezio was overthrowing the Borgias or Bayek was starting the Brotherhood? Her dialogue implies that she has traveled all over the world, and probably had a lot of interesting adventures. She may have also had a part in some major world-changing events.
6 Origin of the Order of the Ancients
Assassin's Creed: Origins may have shown the start of the Assassin Brotherhood, but the Order of the Ancients had already been operating for a long time when Bayek and Aya began their revenge quest. Legacy of the First Blade revealed that they go back at least as far as the Peloponnesian War, if not even further, and Valhalla confirmed they were still around in the early Middle Ages.
There is undoubtedly a lot of room to explore their activities between Origins and Valhalla (almost 900 years worth of material), but there is also no clear answer as to where they came from.
5 Origin of the Instruments of the First Will
A somewhat cryptic organization, the Instruments of the First Will acts as a third faction in the ongoing conflict between Assassins and Templars, but aside from their goal of restoring the Isu, not much is known about them. Syndicate revealed that they operated a German spy ring during World War I, and they were controlled by Juno herself. Valhalla offered some possible hints through the character of Fulke, a member of the Order of the Ancients who reveres the Isu and operates under the title of "The Instrument," suggesting the Instruments of the First Will and the Templars have a common ancestry. But there is still so much we do not know about them. While Fulke may indeed have laid the groundwork, the transition from Order of the Ancients to the Instruments of the First Will has not yet been shown.
4 Aveline De Grandpre
Liberation was notable for introducing the first female protagonist to Assassin's Creed- Aveline de Grandpré. The only downside was that Liberation was a much more simplistic game compared to other entries, and had little to connect it to the previous installments besides a cameo by Connor from Assassin's Creed III. Aveline's only other appearance was in a short DLC for Black Flag. For a great character, there is still a lot more that could be done with her. Liberation revolved around Aveline tracking a major player in the real-life slave trade, something that would continue in America for several decades. It would hardly make sense for her to stop fighting as soon as she assassinated the "company man."
3 Vinland
Assassin's Creed: Valhalla had a brief but notable level where Eivor has to travel to Vinland, which would become a major part of Viking history (the exact location is disputed, but believed to be somewhere in Eastern Canada), but Eivor arrives almost a century before serious colonization of Vinland begins, and Valhalla does not even touch Greenland, which will later be settled by Erik the Red. There is definitely story potential to exploring Viking Era-North America in more detail.
There is also the Iroquois tribe Eivor encounters. While her interactions with them are limited by a language barrier, the section did produce one interesting character in the form of the Iroquois' leader- a strong, intelligent woman who could offer a new perspective. Eivor also leaves them with an Apple of Eden (which may or may not be the same one later protected by Connor), which could open up room for new stories focusing on the Iroquois.
2 Shao Jun
While the experimental Assassin's Creed: Chronicles series received a mixed reception, its first installment did make an impression with its lead character of Shao Jun. Aside from being a strong female protagonist at a time when only two others existed (Evie and Aveline), her story covered material untouched by the rest of the series. Very few of the games have taken place in Asia. The story of an assassin in Medieval China got players' attention, making it frustrating that she only appeared in a short spin-off game when she has so much potential. It was recently announced that Shao Jun would star in a new manga series, though this will only work for people who can read manga. A proper Assassin's Creed game with her as the star would be amazing.
1 Reda's Secret
Reda was a self-employed merchant in Assassin's Creed: Origins, where he sold rare items to Bayek and offered rewards for helping people in need. Many players were surprised when he made a reappearance in Valhalla. The games take place 921 years apart, yet Reda hasn't aged. How is this possible? Is Reda somehow immortal and stuck in the body of a child? Is he still alive today? Or are players actually meeting one of Reda's descendants in a Blackadder-esque fashion? Has he secretly influenced other events in Assassin's Creed canon? Who can say?