Actually if you want to get even more technical it came from Nike. And the whole Metro was a marketing gimic cover for MetroMedia rumor has been disproven countless times, only time i ever see it regurgetated is by Red Bull "apologists" trying to foolishly claim that the name is no different.
But you don't have to go fuck yourself, as i think will all the fucking of selves going on in this thread right, now we have passed that limit.
Team owners John Kluge and Stuart Subotnick were executives at the company Metromedia, leading to the inclusion of "Metro" as part of the soccer team's name. Nike wanted the full name to be MetroFlash, but MetroStars was selected.
The Metromedia name has lived on in other projects by Kluge such as the Metromedia Restaurant Group, though the ventures have been largely unrelated to television. When Kluge bought into Major League Soccer in 1995, the club he operated was named MetroStars (now Red Bull New York) after his company.
The MetroStars were known as the New York/New Jersey MetroStars through 1997. The team's name came from MetroMedia, a company owned by the club's original owner/operator John Kluge.
Taken from 3 different articles, from 3 different websites.
I know the internet is full of lies, but, this seems pretty straight forward.