I'm willing to read a script as a narrator, record it, and sync it with any video footage created - I have the hardware and software to do it.
EDIT: I also have a little digital video footage of (daytime) clouds in a sky I shot myself, if anyone wants to add ships flying through the sky at any point in the intro.
Also, is it possible to animate some of the models already used in the game in a pre-defined manner just for a video clip? I don't know too much about animation or modeling, but if I had some aliens or other animated models to work with, I could add video filters, FX, editing, etc.
FURTHER EDIT: If I even had a moving creature or soldier with nothing else against a solid colored background, I could use a Chroma key FX to place the animation on top of a background for parts of the intro, regardless of whether the background is still or moving, computer-generated or real video footage. (I know of a movie that used this technique to make a real live actor look like he was holding an animated cartoon gun.)
I just need some components to work with.