User blog comment:Master Sima Yi/Assassinews 09-07-'12 — Assassin's Creed film news/@comment-5170920-20120709180251

Ubisoft didn't state that the movie was about Desmond, it was only speculated by reporters since the game is about Desmond, but there is no official anouncement about it. (If there is, please redirect me to your source)