Developer CD Projekt RED has put together a documentary video for The Witcher 2, but it's for "internal use only" it says, and clearly shows what we can expect with the sequel.
The Witcher 2: Assassins of Kings is the title. Not sure how long this 'leaked' "confidential video" will last on YouTube, so fans best hop to it quick. It's more of the same Geralt greatness.
Here it is, catch it while you can: