what's missing in that letter is that the song is already produced, and used in one of the trailers. One just has to find a name for it.
Some people from GTPlanet want to do it the Anonymous-way, and exploit a rule set by Yamauchi, that says incase the chosen title is send in by multiple people, all of them get their name in the credits. They may do an forum intern voting on a name and then let the members send it in on their own.