The following contains spoilers for the first two episodes of Moon Knight, now streaming on Disney+.

With the Marvel Cinematic Universe rolling out its Phase Four, fans are quickly speculating over characters who'll soon be making their debut. While many predicted young, fresh faces such as America Chavez and Ironheart are coming to life, Netflix heroes such as Daredevil have entered the fray too. In addition, other nostalgic superheroes like Nova are rumored to be in the works.

On top of that, there's further chatter over which characters will appear from the Fox and Sony movies. Interestingly, one of these, for many years, has been Doctor Doom. But while nothing really has been forthcoming on Jon Watts' Fantastic Four revamp, the villain may actually have already debuted in Moon Knight.

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Moon Knight's Arthur Harrow Could Be Doctor Doom

Harrow and Steven feud in Moon Knight

Harrow only made one appearance in the Moon Knight comics in the '80s as a mad scientist trying to create a zombie army, only to be foiled by Moon Knight. This made it an odd choice for Marvel Studios to focus on such an obscure character, much less cast a venerable A-lister like Ethan Hawke in the role. Thus, it's easy to see Harrow being a red herring with Hawke hiding in plain sight as Doom, using a different identity to mask that he's really the Latverian ruler.

It'd be a nice spin on the villain, who's known for physical masks, with Harrow wearing a spiritual one, disguised as this cult leader with a very sinister purpose. This would allow Doom to make his base, build an army of human drones, as opposed to Doombots, and start a global movement to follow him. After all, Doom has always craved power, and more so, the control of minds, so rather than tech, Harrow could be the key to organically having people become Doom's freedom fighters.

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Harrow Can Easily Shift His Disguise To Become Doom

Doctor Doom Fantastic Four Unthinkable

Harrow embodies a powerful Doom trait -- that of being a mystical arts master. He was formerly an avatar of Khonshu, aka a Fist of Vengeance, and is now following Ammit, the Egyptian goddess who wants to purge the planet of sinners. This provides Harrow the means of powering up as a sorcerer, which he's already doing with his cane, and seeks to further upgrade via the scarab.

Seeing as Doom is always double-crossing people, Harrow may not even be trying to resurrect Ammit, but looking to harness her power for himself. This could cause Harrow to become scarred if the process of transcending from a human to something more backfires. It'd tie into many comics such as Secret Wars or the Sorcerer Supreme arcs, where Doom messing with forces beyond mortal comprehension worked against him, leaving Harrow to now don a more bitter, angry identity seeking personal revenge rather than that of the planet.

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Harrow's Personality Has Other Doom Traits

Ethan Hawke as Arthur Harrow in Moon Knight.

The foundation for this fake-out is further seeded in Harrow's attitude and demeanor on the show. It's very much in line with how Doom appears in the comics -- arrogant, commanding, and someone who clearly views himself as better and more deserving than others. It'd explain why Harrow is obsessed with judgment and purification, which Doom embodies. Seeing as Harrow was none of these things in the comics, it'd just make sense if these characteristics belonged to someone who owned them. And someone wanted to conduct the fate of the world.

To top it off, Harrow already has his castle, seen in the Alps in Episode 1. Many believe this castle resembles Doom's home in Latveria, which can easily be retconned into a city or commune, where Harrow has his devotees growing crops and thinking he's a lord. It may seem small scale for now, but there's no telling what tech or supernatural weapons Harrow has amassed over the years and what these loyalists can really do. Should they be surprise WMDs, it'd once more fit Doom's sleight of hand, which is something the MCU has already done with the Mandarin and which the studio may be looking to improve upon now in terms of motivation and execution.