Warning: This article contains spoilers for Agatha All Along.
Marvel Television’sAgatha All Alongrecently introduced a wild character to theMCUwho happens to be central to the development of Thanos' backstory in Marvel Comics, five years after the Mad Titan’s demise inAvengers: Endgame. I understand whyThanos' origin story saw significant changeswhen the intergalactic villain was adapted for the MCU, with his motivation for seeking the six Infinity Stones standing out to me as the most obvious change. I can’t believe Marvel has now introduced the original reason for Thanos' quest in Marvel Comics to the MCU.
We first saw Thanos in thepost-credits scene ofThe Avengers, though Josh Brolin assumed the role fromGuardians of the Galaxyonward.2018’sAvengers:Infinity Warexplained his reasoning for seeking the Infinity Stones and wanting to eliminate half of all life in the universe, but left out one key detailthat was pivotal to his Marvel Comics history. Now, five years afterThanos' defeat at the hands of Tony Stark’s Iron ManinAvengers: Endgame, Marvel Studios has established this key detail, but I’ve noticed that this has been completely disconnected from Thanos.

Thanos’ Infinity War Story Was Changed For The MCU
Thanos Wanted To Bring Balance To The Universe In Avengers: Infinity War
The act ofThanos acquiring the six Infinity Stones, snapping his fingers, and committing the genocide of half the universe’s population in an instant was taken directly from the pages of Marvel Comics’The Infinity Gauntletevent from 1991.I noticed some huge differences in this story, however, following Marvel Studios' adaption to live-action. In the comics, the heroes of Earth and other worlds don’t become aware of Thanos' mission until after he snaps his fingers, and the Snap is reversed very soon after it occurs, omitting the long-lasting effects that we’re still exploring in the MCU.
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Doctor Strange in the Multiverse of Madness
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Another huge change to Thanos' Infinity Stone quest I noticed was in his motivation. In the MCU, Thanos explained his suggestion of random genocide on Titan after realizing the population was growing too fast for finite resources to keep up. He extended this idea across the entire universe, leading toInfinity War’sending, which sticks out to me as one of the MCU’s most memorable moments. In Marvel Comics,Thanos wanted to commit this act to impress Lady Death, the personification of death itself, who he had been enamored with ever since she influenced him during his childhood.

Agatha All Along’s Death Reveal Introduces A Key Part Of Thanos' Comic Story After His MCU Death
Aubrey Plaza’s MCU Character Connects To Marvel Comics' Thanos
Now, five years after Thanos died inAvengers: Endgame, I am thrilled that Lady Death has finally been introduced to the MCU. Aubrey Plaza made her debut as Green Witch Rio Vidal inAgatha All Along,WandaVision’sfirst spinoff series, and the fact that she has no Marvel Comics counterpart prompted major theories about who she could have been playing. I loved seeing theories regarding her being theMCU’s depiction of Lady Death, and I was shocked and excited whenAgatha All Alongepisode 7, “Death’s Hand in Mine,” finally confirmed that Aubrey Plaza is indeed playing Lady Death.
How Powerful Death Is Compared To Thanos & Marvel’s Gods
Agatha All Along may have introduced one of the most powerful characters in the MCU, raising the question of how Death’s power compares to other gods.
Speaking toInversein October 2024,Agatha All Alongcreator Jac Schaeffer sadly confirmed Thanos would not be appearing in the series, and his connection to Lady Death in Marvel Comics would not be addressed.Thanos' mission to collect the Infinity Stones and wipe out half the universe’s population in the MCU featured no mention of Lady Death whatsoever, andAgatha All Alonghasn’t yet seen Death mention Thanos, so I suppose the pair simply aren’t linked. While some may find this disappointing, I reckon this changed storyline makes far more sense for the MCU.

Why The MCU Introduced Its Version Of Death So Long After Thanos' Movie Ending
Lady Death Seems To Have No Connection To Thanos In The MCU
Lady Death is one of Marvel Comics' weirdest and most complex characters, so I think it would have been too outlandish for Marvel Studios to introduce Death during the Infinity Saga. Wilder Multiverse Saga projects such asLoki, Doctor Strange in the Multiverse of MadnessandThor: Love and Thunderhave established significantcosmic beings in the MCU, so it seemed a natural progression for Death to now make herself known.Thanos' more-grounded mission inInfinity Warmade more sense to me, and had a bigger impact by relating to something easier for us to believe, such as overpopulation fears.
Thor: Love and Thunderfeatured a statue of Death alongside structures depicting cosmic beings such as Eternity, Infinity, the Watcher, the Living Tribunal, Eon and the One Above All.

It has also been of huge benefit toAgatha All Alongthat Lady Death plays such a major role in the series and in the backstory of Kathryn Hahn’s Agatha Harkness herself.Agatha has taken hundreds, if not thousands, of lives throughout her lengthy history, which led to her becoming embroiled in a romantic relationship with Death as a consequence. This shows us the more human qualities of bothAgatha Harkness and Death, which makes us more invested in both these formidable characters, but also strangely more terrified of them, too, and I think this is the perfect balance.
Agatha All Along
Cast
Agatha Harkness, after the events of “WandaVision,” seeks to regain her magical powers. Joining forces with unexpected allies, including the son of an old adversary, she battles new mystical threats while uncovering hidden secrets in the magical realm.
