User blog comment:Master Sima Yi/Assassinews 08-02-'13 — Next game will be all new, plus DLC promotional material/@comment-77.45.54.119-20130214114136/@comment-1153722-20130214142555

The Pieces of Eden and all other First Civilization technology are never explained either, except for 'created by superior intelligent beings'. Same for Eagle Vision. Why would this be unacceptable? I'm not always a big fan of non-canon material, but if there is any place where over-the-top and unexplainable things should be, it is in an alternate non-canon story. This DLC is just meant for entertainment, not to expand the lore.