Check out Game Invasion for a good 3-minute interview with SC5: Conviction Producer Mathieu Ferland at the recent UbiDays. He talks about the progression of Sam Fisher going from special agent to double agent to fugitive; and the gameplay mechanic of stealth in the game from using light and shadow to improvising with anything in the environment. (Hmm ... some inspiration from Robert Ludlum's Jason Bourne?)
Ubi has also announced that you can now read Conviction "Game Manager" Thomas Geffroyd's developer's blog.