Marvel just dropped another Mephisto reference and sparked the best new MCU theory

Warning: This article contains spoilers for Agatha All Along Episode 1, “Finding the Way,” and Episode 2, “Circle Swn with Fate / Unlock Your Hidden Gate”

An important character related to Mephisto in Marvel Comics may just be referenced in Marvel Television Agatha all alongSpearheading a huge and believable new MCU theory. The first two episodes of Agatha all along have finally premiered on Disney+, and Kathryn Hahn’s Agatha Harkness is already free from the spell of the Scarlet Witch, and has gathered a new coven of exciting witches and set out on the Witches’ Road in an effort to reclaim her power . If that wasn’t enough, the double-premium may have also provided the MCU’s latest Mephisto tease.

Based on the Faust demon Mephistopheles, Mephisto is one of Marvel Comics’ most notable, recognized and powerful supervillains. This prominence makes his debut in the MCU inevitable, however Mephisto has been heavily rumored to make his grand entrance for several years now, with hints of his existence being featured in WandaVision, Loki And She-Hulk: Attorney at Lawamong others. Agatha all along Could have just teased Mephisto yet again, as there were some mentions of a “Black Heart,” Which may, in fact, be referring to Marvel Comics’ Blackheart.

Who is Blackheart and how is he related to Mephisto?

Blackheart is Mephisto’s son in Marvel Comics

Blackheart is a terrifying character in Marvel Comics, created by Ann Nocenti and John Romita Jr., and first seen in 1989s. Daredevil #270. Most commonly depicted as a dark and demonic opponent to Ghost Rider, Blackheart has crossed paths with a number of other heroes, including Daredevil, Spider-Man, Wolverine, Wonder Man and Sam Wilson, among others. Blackheart is remarkably powerful, with a wealth of supernatural abilities, and, interestingly, he is also depicted as Mephisto’s sonHow the more notable demon used magic to create Blackheart.

After centuries of murder in the city of Christ’s Crown, New York, Mephisto used the accumulated evil energies in the city to investigate Blackheart. Mephisto trains his son in the arts of evil, however Blackheart becomes fascinated with humanity’s free will, and soon returns to Mephisto, starting an age-old feud between the pair.. In his war against Mephisto, Blackheart performs several heinous acts, and tries to attract various heroes to join his cause. Blackheart later becomes more of a conventional villain, taking Mephisto’s place as ruler of Hell.

Agatha all along’s “black heart” moment explained

Agatha all along made a big deal out of Rio Vidal’s black heart

Agatha all along The first two episodes mentioned a “Black Heart” On several occasions. the main thing Patti LuPone’s Lilia Calderu notes in episode 2 that the fifth name she jotted down as prospective members of the new coven isn’t a name at all, but a drawing of a black heartWith Agatha hilariously suggesting is simply because she was using a black pen. While Agatha tries to explain that this must mean Debra Jo Rupp’s wife Hart, aka Sharon Davies, harking back to WandaVision’s Premiere, Calderu’s black heart drawing actually refers to Aubrey Plaza’s Rio Vidal.

During the fight between Agatha Harkness and Rio Vidal at the end of Agatha all along Episode 1, Vidal mentions that she really has a heart, and that it is black and beats for Agatha. Lilia Calderu was suggesting that Vidal, a green witch, would be necessary for the coven to access and survive the Witches’ Road. Vidal’s own declaration that she had a “Black Heart,” However, has spurred a major new theory that she may, in fact, be Marvel Studios’ interpretation of Mephisto’s child from Marvel Comics.

Marvel fans think that Agatha sets up Rio Vidal as Mephisto’s daughter

Rio Vidal’s backstory has yet to be explained

The repetitive mention of a black heart and its connection to Rio Vidal in Agatha all along Double Premiere has led many to theorize that Aubrey Plaza’s MCU character could be a depiction of Blackheart from the comics (via X). This wouldn’t be the first time that Marvel Studios has gender-swapped Marvel Comics characters, and it would be a great way to tease Mephisto’s much-anticipated debut. Nothing is known yet about Rio Vidal’s backstory or her history with Agatha Harkness, but the upcoming episodes of Agatha all along Could finally bring Mephisto, perhaps Vidal’s father, into the MCU.

New episodes of Agatha all along Release every Wednesday at 6pm PT / 9pm ET.