So this just happened: apparently, Blizzard has teamed up with Paul Jr. from American Chopper to do a webseries where two competing teams will work to create custom choppers for the Horde and the Alliance. Players will vote to see who wins the competition. And the winning team gets their chopper implemented in-game.
EDIT: The youtube embed doesn’t seem to be working, but check out the video here. The webseries will begin next week on April 17th.