It's time for the fight of a lifetime, Young Justice vs. Old Justice! Old Justice believes that YJ is irresponsible and shouldn't be in the superheroing game because they're dangerous. But, when OJ shows themselves to be more dangerous than they are, Wonder Girl delivers an empowering speech to CDTV cameras, asking that all superheroes (young and old) appear at a gathering for the support of young superheroes. Contessa uses this event to further one of her evil (and crazy) plans. When all of the heroes are in place, Contessa sends in the Point Men and Klarion to deage the JLA. After a confusing brawl, magic flies and manages to switch the ages of all the people involved. The JSA are toddlers, the JLA are pre-teens and Young Justice are adults? Good lord.