The name or term "Derby" refers to more than one subject. For a list of other meanings, see Derby (disambiguation).
Fleetfoot, ally...or foe?
The Derby Planet is a newspaper that presumably exists in Equestria, though in an unknown region. It appeared in Fleetfoot's imagination after she marriedBig McIntosh with a news article announcing the disbandment of the Wonderbolts, since there was no point in the team continuing after their best flyer had left them to persue romantic interests.