User blog comment:Master Sima Yi/Assassinews 08-02-'13 — Next game will be all new, plus DLC promotional material/@comment-4999424-20130217172021/@comment-4519956-20130217190235

Now this is interesting AND puzzling. He explicitly states that the DLC is canon and says that it will reveal how an Apple of Eden came into Washington's possession (the latter of which has already been established as canon in ACII's glyphs). Yet, it takes place in an alternate-reality. I'm very intrigued to see how they work this...