Assassin's Creed Shattered Timeline.

Watch Dog Aiden Pierce, Marcus Holloway, or a new Watch Dog know they come from a family of Assassin's. They use their hacking skills to hack into CTOS/Blume in order to gain access into Abstergo. After Gaining access they find out the Templars have found and are currently studying hands on with a new Piece of Eden. That Watch Dog finds out the Location of where they are doing research on it at. So He/She make their way through the Templar Security and gets to where the Piece of Eden is to see it inside of a huge machine. He/She gets into a gunfight (cut scene gunfight ) then the Watch Dog is out numbered so He/She throws a Grenade over His/Her cover not looking so they don't get shot to take out as many enemies as possible and eplodes near the machine. The Machine explodes and it shatters The Piece of Eden and sends a huge Shockwave throughout the city. The Watch Dog survives along with multiple Enemies and they shoot out a glass window nearby and shoots a Grappling Hook to a ledge of a building across the way and slides down it to notify tge other Watch Dogs (who he helped become Assassins) what happened. On the way there he notices people dressed in unusual clothing that look like people from the London time period of where Jacob and Evie Frye were from and tge more he drove the more the people dressed in clothing changed through timezones. He then saw this yellow glowing portal that led to another Time.

So my whole Idea in this storyline is that the Templars found these portals before the Watch Dogs to go and warn the past Templard when where and how they are going to die so they reinforce the past Templars with new weapons and more people. So The watch Dig goes and warns all the Assassins none if them believe him so he shows them the portals. He takes care of the Templars in his timeline and tgey take care of the Templars in their timeline. After they kill the Templars in their timeline they return tge new aged weapons and the bodies from the Watch Dogs Timeline to the original Timeline so nothing gets altered. So this game can havr up to multiple games. At the end of all the Games they need to put back together all the Pieces Of that Piece of Eden to get rid of all the portals. One piece for each Game. We can't involve killing Shay or having him stay an Assassin because that would alter the future. In my opinion I think we should leave him out and have the other main Assassin's be understanding why he did what he did.