JLA CLASSIFIED ships twice in September, kicking off "The Ghosts of Mars!" The Martian Manhunter struggles with the memories of his long dead family…but when the memories fight back, the Manhunter's position among the Justice League of America is shaken!
J'onn J'onzz is on Mars, meditating on the fate of the Red Planet and holding a conversation with his brother, Ma'alefa'ak. Though Malefic is dead, during their youth, J'onn and Ma'alefa'ak shared in the Martian rite of G'amal'khul, the exchange of self between loved ones. Centuries later, this aspect of self left behind in J'onn's psyche still persists. They discuss J'onn's relationship with the JLA and the people of Earth, arguing over his assimilation (or lack thereof) into their culture.
In flashback we see J'onn encountering Superman before he had come out as an alien and a superhero, and dealing with a xenophobic witch hunt by Lex Luthor. After this Superman introduces him to what would become the Justice League.