Too many (actually every DC hero besides Batman and Superman) heroes can't stand up to the All Star Superman test. Can you tell their origin in 8, understandable words? It's why all their other franchises bomb and Marvel's keep rising to heaven.
Not 8 but close enough:
Green Lantern - Test Pilot Hal Jordan receives a magic ring from a dying alien
Wonder Woman - An amazon warrior from Paradise Island is sent as ambassador to man's world
Barry Allen - Forensics scientist gets dosed in electrically charged chemicals and becomes THE FLASH!
Martian Manhunter: The last martian, teleported to earth by scientific experiment, lives incognito amoung us!
Aquaman: The son of a human scientist and the queen of atlantis trying to discover his place in the world.
Booster Gold: A loser from the 25th. century travels back to our time to be the worlds greatest super hero.
Seriously what is so complicated? I would honestly say those origins are even less complicated than Iron Man, Thor, and Captain Americas. Also DC characters look visually more interesting than Marvels: