“Agatha All Along” has been leading the way toward the darker aspects of Marvel Comics, and the introduction of Lady Death is just the beginning. Lady Death, also known as Mistress Death, is a cosmic entity that embodies death itself, responsible for guiding lost souls into the afterlife.

Initially introduced as a villain for Captain Marvel in the comics, she has encountered many Marvel characters over the years, including Deadpool, Loki, and even Thanos, with whom she had a romantic relationship in the comics.

The introduction of Death could mark the beginning of Marvel Studios formally incorporating the powers of the underworld and afterlife into the MCU. This development may also suggest that the long-awaited arrival of Mephisto (a.k.a. the devil) is still on the horizon in “Agatha All Along.” Although Mephisto and Death do not share a significant relationship in the comics, their mutual connection to dark magic makes their sequential appearances on-screen plausible.

Another intriguing connection involving Death in the comics is with The Beyonder. The Beyonder plays a crucial role in the “Secret Wars” storyline, where he attempts to pit various universes against each other in an epic battle for survival.
Before the “Secret Wars” storyline began, the Beyonder waged war against Lady Death, aiming to eliminate the concept of death from the universe entirely. This venture did not end well for him, ultimately leading him on a path toward the “Secret Wars” saga. 

Currently, it appears that the MCU will omit the Beyonder from its “Secret Wars” narrative and instead emphasize Doctor Doom; however, Lady Death could still have a role in the story.

There have been hints about a future for Plaza’s character in the MCU beyond “Agatha All Along.” It’s possible that her character, Death, could help set the stage for the franchise’s upcoming Avengers movies. Alternatively, Death might play a significant role in stories involving Joe Locke’s character, Teen, as he seeks to bring his deceased mother, the Scarlet Witch, back to life in the future. 

The first seven episodes of “Agatha All Along” are now available for streaming on Disney+.