Warning! SPOILERS for Moon Knight.
Marvel Studios finally explains how Avengers: Infinity War and Avengers: Endgame's Soul World actually works. The MCU is in its rebuilding period after the Infinity Saga culminated. Thanks to its interconnected storytelling, unclear details from the past can be explained through current projects, which is exactly what Moon Knight did regarding the Soul World.
Disney+'s sixth Marvel Studios series introduced a brand new hero into the MCU in Oscar Isaac's Moon Knight. His arrival also opens up a pocket of the franchise with the further exploration of the concept of gods. In Moon Knight, Marc Spector gains superpowers from the Egyptian moon god, Khonshu. It also expands on what's known about the afterlife in the franchise with the introduction of Duat. As explained by the hippo goddess Taweret, it is «an afterlife. Not the afterlife» and is among the«many intersectional planes of untethered consciousness exist.”
Related: How The MCU Changed Moon Knight's Origin
Moon Knight referenced the Ancestral Plane from Black Panther as another version of afterlife in the MCU. Essentially, Avengers: Infinity War and Avengers: Endgame's Soul World works the same way. Marvel Studios never actually named the yellow-tinged realm that Thanos (Josh Brolin) and Iron Man (Robert Downey Jr.) separately found themselves in after their respective snaps. Marvel Studios simply referred to it as »the waystation." It's essentially a place of introspection, allowing people visitors, whether dead or on the cusp of dying, to look back at their lives and the major events that shaped them. That's exactly what Duat was in Moon Knight, as Marc Spector and Steve Grant were forced to reconcile some of the most traumatic
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