Oh come on....did you really think we wouldn't want more? Sounds like from the way that first one ended all abruptly that it went on a while longer. I know we'd all like to see more.
I think I'd like to see a whole game played out DVD commentary style...where you have 3-4 of the key developers in a room, and you all play the game and talk about what the AI is doing, how the graphics engine works, how you arrived at one design option vs. another option...etc. Hell I'd probably pay money for that...but it would have to be a decently long game, maybe an hour or two. I'm a sucker for DVD commentary. I've bought a couple of games that have some bits of "the making of this game" type material, but never an actual play-through of the game. In most games this just isn't practical, but I'm sure it could be with yours.
If I were producing that I'd either do it where the developers are in a room playing the game live and commenting, or they play the game ahead of time, record it and comment on a playback. They both have merits.