Hades United got its name due to the pomegranate Hades gives to Persephone. If you are unfamiliar with the myth, please keep reading:
Hades wanted to get married, and instead of courting someone (who has the time!) he bursts out of the ground riding a chariot of black horses and abducts Persephone, goddess of spring.
Demeter, who is Persephone’s mother, goddess of the harvest, and Hades’ sister (nothing scandalous here… I can explain… no, I can’t… let’s keep moving), upon finding out her daughter is trapped in the underworld, refuses to let the Earth fruit. And so the grounds go cold and dry, and a terrible famine assaults the Earth, while folks in Greenland wonder, “So what’s new?”
Zeus, who does not own a winter coat and doesn’t feel like going to Nordstrom, sends Hermes, the messenger god, to broker a deal and convinces Hades to let Persephone go. As a good-bye gift, he gives his wife a pomegranate.
Demeter is delighted to see her daughter back, and immediately asks her if she ate anything in the underworld. Because, as it is made very clear in the Gods Rulebook that no god respects (because you ain’t trying if you ain’t cheatin’) if you eat anything in the underworld you must stay there forever.
So Hades goes finders keepers on Persephone again, and the gods are forced to call the big guns. Rhea, the mother of all these quarrelsome, mischievous and incestuous gods goes down to lawyer a new deal, and it is decided that Persephone is to spend part of the year with Hades. Demeter reluctantly agrees, but says that nothing will grow on Earth while her daughter lives in the underworld.
Hence the seasons.