User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-5019018-20140907152230/@comment-25419730-20140908134115

Dunno if you guys are talking about that trailer that's basically just a montage of cutscenes, but when Shay is fighting that assassin in the manor, it definitely sounds like Achilles. Listen to the sounds he makes. Sounds exactly like Achilles' frail, old mannish voice (despite the fact that he's way younger here).