User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-4999424-20130305125147/@comment-4975789-20130305165445

I'd assumed that the modern story would be done in a similar way to AC:R's multiplayer, but if there is no modern story, then obviously not. Hope it does have a story.