That, I think, was not really a great idea- you know how when you make something really awesome, you want to glue it to everything you possibly can? No matter whether or not its actually a good idea? Kind of like that. The extended intro doesn't fit with anything other than the extended intro (read the background story, Nomads don't wake up till we wake 'em up, and they aren't as advanced as us- supported by in-game rumors and plot, I might add).
That doesn't make this source material any less awesome.
YEEHAW!!!
EDIT: Another possibility is that, a person no one ever saw before, landing in an old ship and claiming there were aliens that knocked the sun just *might* not be taken seriously, or possibly as a spy. He'd have likely been interrogated by the people working on Valhalla 1, but otherwise hushed up.