User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-4786308-20140828115236

The main theme of AC Unity was used in this trailer made by gameinformer. Someone asked in the comments what was the song used and gameinformer replied it was the main theme of ACU. Glad to hear the whole theme isn't a variation of Ezio's Family, but just 10 seconds of it.