Warning: SPOILERS for Moon Knight episode 4!
The Marvel Cinematic Universe's first Thanos was secretly introduced in Moon Knight episode 4. Marvel Studios spent the better part of the Infinity Saga building up the Mad Titan as the universe's biggest threat. His quest to collect the six Infinity Stones came to a head in Avengers: Infinity War, where he was successful in utilizing the powerful stones to rebalance (aka wipe out half the population of) the universe. Thanos' actions made him the biggest villain the MCU has ever seen, but now Moon Knight secretly introduced the universe's first item-collecting and potentially all-powerful villain.
While Moon Knight ignored mentioning Thanos before, the series' limited MCU connections have allowed it to instead establish Egyptian mythology and introduce some of the powerful beings associated with it. The debut of The Ennead gives the MCU a god-like Avengers team that has so far elected to stay out of humanity's affairs. However, there are also gods like Khonshu using their powers, while Ammit wants her power unleashed to judge humanity. Moon Knight episode 4 introduced other gods, such as Taweret, and even revealed that Alexander the Great was Ammit's former Avatar. But, the mention of Heka also teases the MCU's first Thanos.
Related: Moon Knight True Story: Is Alexander The Great’s Tomb Missing?
Moon Knight episode 4 introduces Heka priests guarding Alexander the Great's tomb, where it is mentioned they were sorcerers of their time. Their name might secretly confirm the presence of Heka-Nut, a powerful sorcerer from Marvel Comics who worked with four primal gods. In the comics, Heka-Nut has a very similar mission as Thanos. He wants to collect four relics known as
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