User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-4999424-20130312204140/@comment-3046679-20130313135450

Ok, so I've concluded now, that vid shows something from the next episode of ToKW. Now, seeing as that comes out next week, and that's obviously -after- the ACIV's been announced, this proves that BF wasn't "hinted" in AC3, but rather they're bridging the gap slightly by putting these small bits of info into ToKW.

It also shows that entire ign article is bullshit and they don't know what they're talking about.