The featurette gave us our first look at an Apple of Eden, which people speculated would arrive (and there’s already merchandise for), but hadn’t yet been spotted in the movie. The Apple of Eden first made an appearance in the original Assassin’s Creed game. It was one of several Pieces of Eden, which were technologically advanced devices that the Isu, an advanced race of humanoids, made for different purposes — though mostly to control humans, who were created to work as slaves.
Thousands of years after a solar flare wiped out most of the Isu, the Templars sought out various Pieces of Eden in order to control humanity and ensure their rule. It’s one of the main reasons modern Templars built Abstergo, so they could use genetic memories to find out where the remaining Pieces of Eden were located. So, it makes sense that the film’s version of Abstergo would also be seeking them out.
It does raise the question of what exactly the Apple of Eden will do in the film — whether it will simply be a device of power, or they’ll connect it to the larger story of “Those Who Came Before.” The video game’s mythology is vast and complex, and it seems impossible for them to dive into the insanity that is the entire history of humankind.