With Revelations coming out on November 15, this year is the third in a row we've gotten a new, non-spinoff Assassin's Creed game, and next year would be the fourth in as many years. While it might seem like too much for such a short period, there is a reason for Ubisoft Montreal to get so many games out in such a short period -- the world is ending next December. Or, at least, it is set to end in the world of Assassin's Creed. There's belief in the real world that an apocalypse-type event of some sort will take place on December 21, 2012, and this served as the inspiration for something similar to happen in Assassin's Creed. As such, the developers feel the need to complete the story before we pass that point in the real world.
"In Assassin's Creed we set up a timeline with this whole end of the world plot of December 2012," Ubisoft's Alexandre Amacio told Eurogamer. "That's fast approaching, and the story we have to tell, we obviously need to do it before we arrive at that point."