Warning: SPOILERS for Moon Knight episode 2
The Marvel Cinematic Universe has already set up why Marc Spector will return in Phase 4 and beyond after Moon Knight. Oscar Isaac's superhero character is one of the many new heroes Marvel Studios is introducing in Phase 4. Shang-Chi and the Eternals got solo movies, while Yelena Belova, Kate Bishop, and others were introduced as supporting characters. Just like each of those prior examples, Moon Knight is expected to be the beginning of a long tenure in the MCU for Marc Spector/Steven Grant, and Marvel is already providing viewers with an explanation for why he'll keep coming back.
The idea that Moon Knight would come back in future MCU projects is standard for Marvel Studios, but Moon Knight complicated matters a bit with how it established the relationship between Khonshu and his Avatars. Episode 2 establishes that Marc is only doing what Khonshu wants out of servitude toward the Egyptian god. However, he believes that the current mission to stop Arthur Harrow from awakening Ammit will be his last. If that was the case, then Moon Knight would be the only time Marc Spector would appear in the MCU. The different expectations that Marc and Khonshu have for their partnership could be concerning on the surface for his MCU future.
Related: Where Are The Avengers During Moon Knight?
It seems Marvel Studios remained a step ahead of those concerns, though, as Moon Knight episode 2 establishes why Marc Spector will continue his superhero ways. When Arthur and Steven discuss the role of being Khonshu's Avatar, the Moon Knight villain is adamant that the Egyptian god is a liar. This is followed by Arthur Harrow saying that no matter what Khonshu says in regards to their current
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