WARNING: The following contains spoilers for Peacemaker's Season 1 finale, "It's Cow or Never," now streaming on HBO Max.

Crossover events have become such a big part of superhero television shows, with the exclusion of Marvel and its many series. The DC Extended Universe, on the other hand, allows its characters to move freely throughout its shows, such as the Justice League in Peacemaker's Season 1 finale.

Peacemaker was never a stranger to referencing the heroes of its shared universe, most of whom became the butt of jokes. Aquaman is often joked by Peacemaker/Chris Smith and Vigilante as having sex with fish, and the season finale quips that the Green Arrow attends "Brony conventions dressed as the back half of Twilight sparkle." Regardless of the suspected rumor, this confirms Oliver Queen's existence and notoriety as a hero in the DCEU. And to add a DC cherry on top, most of the Justice League shows up after the final Butterfly fight, with Ezra Miller and Jason Momoa reprising their roles as the Flash and Aquaman, respectively.

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The Justice League appears in the finale of Peacemaker

Peacemaker's star-studded cameos is an amazing feat, but it acts as a reminder that its competition is failing in this category. The Marvel Cinematic Universe has taken the lead in the crossover race, especially after the Guardians of the Galaxy and the Avengers worked together in Avengers: Infinity War, but their shows are lacking the itching teases of cameos that leaves room for theories. The only exciting appearance that can stand up against the Justice League in Peacemaker is Kingpin in Hawkeye, as his place in the series makes Daredevil canon in the MCU.

But other than Kingpin, the Marvel shows have seriously lacked the cross-over events that have kept the Arrowverse shows on the air. As the first Marvel show during the beginning of the MCU, Agents of S.H.I.E.L.D. threw hint after hint about the Avengers and the Battle of New York, letting fans anticipate a Tony Stark or Thor appearance. But alas, they never came, and it began a cycle of catastrophic affairs that one hero was responsible for, without any help from the Avengers.

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2012 Original Avengers Stark Tower

The Avengers being shut out of the picture has become a frustrating reoccurrence that even the MCU has laughed at. In Ant-Man, Scott Lang suggests calling the Avengers when hearing about the Yellowjacket project, but it's left to be a gag, much like the idea that Sam Wilson and Bucky Barnes were fixing a boat when the Eternals were busy stopping an Emergence. When Wanda subconsciously enslaved an entire town with chaos magic in WandaVision, the Avengers were conveniently no where to be found, even if they always gloated on being a family. Compared to the Justice League, the Avengers seem to be a group of random individuals who pick and choose which world-ending event to involve themselves in.

Peacemaker refuses to make the same mistake that has been crushing the MCU's rationality for its heroes' absences. Leota Abedayo asks her mother, Amanda Waller, to send the Justice League as the Task Force X team is looking a little discouraging. It seems like Amanda scraps this request, but the Justice League -- without Batman and Cyborg -- actually arrive, but just a bit late. Nonetheless, the Justice League seems much more reliable than the Avengers, even if they have awful timing.

To see how the Justice League springs into action, watch the Peacemaker Season 1 finale. Season 1 of Peacemaker is now streaming on HBO Max.

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