Kojima revealed some more information on his Twitter page. Like yesterday, he is still busy re-recording voices for the PlayStation Vita version of MGS2 and MGS3. Today he’s working with the voice actor for Major Zero.
Kojima also gave examples of some new lines, at the same time revealing new control options for the game. He mentioned you can now slit enemy throats by wiping over the trackpad on the back of the system. You can also use the trackpad to move the camera, or zoom (I’m not sure here) when you are in first person mode.
Source: Kojima’s Twitter