Planetary / Batman / JLA

In this 2003 one-shot from DC Comics, writer Warren Ellis and artist John Cassaday bring the world-hopping archaeologists of Planetary into a tense crossover with Batman and the Justice League of America. The story sees the Planetary field team investigating a mysterious artifact in Gotham City, only to cross paths with the Dark Knight and his powerful allies. This single issue stands as a compact, self-contained meeting of two very different investigative teams, offering a glimpse into how the Planetary organization's secret history intersects with the DC Universe's greatest heroes.