speaking with AusGamers, Prince of Persia animation director David Wilkinson was heaping praise on Alex Drouin, who worked on animations for Prince of Persia: The Sands of Time, as well as mega-hit Assassin's Creed. When asked what Drouin is up to now at about 14:28 in, Wilkinson said "He's busy making Altair even more beautiful. Last thing I saw him do was getting Altair to swim."
This off-handed comment seems to suggest (1) New Assassin's Creed game is in the works (shock). (2) It will at least be partially focused on Altair. (3) He will swim, which, considering his bulky cloth duds, could be the most surprising part of all.