The game will be set in the Assassin's Creed universe.The themes are similar (fighting against the conspiracy that runs the world behind the scenes), the UI aesthetics are similar, and they're both from Ubisoft. The use of modern technology to monitor and control people is something that the Templars have already done.
Aidan is EruditoHe has the skill capable of getting into Abstergo's systems (and all this just from the demo, no less). You could say that the mobile players he calls on to help him are people he has convinced of Abstergo's grand conspiracy (and on a metafictual level, Erudito's messages are uncovered by us, the players, who are also the same people that help Aidan so it all neatly wraps together).
This is [insert series] The Game
The ending involves Aiden putting Chicago, if not the world, back in to the Dark Ages by shutting down the ctOS
Aiden was a government operativeThe government built the cTOS to heighten security and reduce crime and terrorism, like in Personof Interest. They trained a select few operatives to optimize use of the system and combat criminals and terrorists. This would explain Aiden's espionage/combat skills and other important details. On a related note...
Aiden was, maybe still is, an undercover copHis Weapon of Choice for hand-to-hand combat is a cop-style telescoping baton, which he clearly knows how to use, and in the trailer showcasing the crime prediction system he hesitated before putting a bullet into that guy who threatened his ex-wife with a blade, despite the fact he had him dead to rights. As for electronically pickpocketing that guy a few seconds earlier? Well, this is Chicago. Coat, Hat, Mask. Basically, Aiden is The Shadow for the information age.
If there's a sequel, the story changes depending on your karma levelIt's like playing Infamous 2 where people react to you if you were good or evil.
Aiden will become a, at best, Type IV/V Anti-Hero, if not an outright Villain Protagonist, by the end of the game.His crusade will spiral out of control and pretty much anyone will become a target.