Wow, this came out of no where. With Sonic CD due to be released this week there hasn't been a whole lot of marketing for it yet now Sega have released this rather special video. In it art director Kazuyuki Hoshino shows us a whole ton of concept art from the game, including a lot that has never been seen before! What a wonderful surprise for fans of the game! Now all I'm wondering is why the room he is sitting in is full of rocks..maybe he's in the past version of that room?