During "Brightest Day", Megan is asked by Batman to contact Starman after he is captured by a crazed Alan Scott. After coming aboard the Justice League Watchtower, she mentally reaches out to Starman and begins to relay information about his prison, only to transform into her White Martian form and attack the Justice League. Before Megan can injure any of her fellow heroes, she is knocked unconscious by Power Girl, who implies that she had been possessed by the Starheart, the cosmic entity that granted Alan his powers.