User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-4786308-20141024092410/@comment-733050-20141024113826

That was basically Rise of the Planet of the Assassins (no wonder Andy Serkis provided the voiceover). They weren't kidding when they said they'd include all the customized Assassins the fans made for Unite.