(W) Justin Gray (A) Rick Leonardi (CA) Walter Simonson. Written by Justin Gray Art by Rick Leonardi & Sean Phillips Covers by Walter Simonson "The Ghosts of Mars" Parts 3 and 4 of 5. The original Justice League learns how to accept the Martian Manhunter as one of their own* but the most alien of the League comes with some baggage in the form of his brother's ghost!