IGN conducted a short interview with Kiefer Sutherland on his role as Snake in MGSV (part of which was already published a while back).
When asked how his voice work for Snake differs from previous incarnations, Sutherland almost revealed something he wasn’t supposed to when he wanted to give an example. “There’s one point that’s very very significant.” Kiefer left it at that.
Kiefer said Snake will be ‘edgier and more angry’ because of what happened in his life. “The rest you will have to find out in the game.” he continued. “Because there is a secret that is actually very cool.”
Here is the video of the interview: