Overall, the Avengers that hasn’t been brought into the live-action landscape yet, and while her inclusion may seem difficult at this point in the series, Marvel Comics already laid out exactly how she can be added.
Heather Douglas aka Moondragon is a character from Marvel’s prime timeline of Earth-616 who has a bit of a complicated history. When she was a little girl, Heather and her parents were involved in a car accident, one that Thanos was responsible for. Heather’s parents were killed in the accident (though her father would later be reborn as Drax the Destroyer) leaving Heather orphaned. That is, until she was found by an Eternal named Mentor and brought to Titan where she was raised by a monastery of monks. There, Heather unlocked her psychic power through which she was able to make with a cosmic entity known as the Dragon of the Moon. After making , the Dragon of the Moon slowly began to corrupt her mind as it tried to make her its avatar. This led to Heather renaming herself Moondragon before taking up a life of villainy. Over time, however, Moondragon was able to wipe the Dragon of the Moon from her mind and use her powers for good as a member of both the Avengers and the Guardians of the Galaxy–a heroic end to a long and arduous journey.
In Ultimate Extinction by Warren Ellis and Brandon Peterson, Heather Douglas is dead, she died in a car accident more than twenty years ago, but a version of her exists in the modern day–many versions of her, to be exact. In this universe, the Ultimate Universe of Earth-1610, Heather was an assassin who, after she died, was cloned by an organization known as the Enclave Cult. This cult worshiped the planet-consuming cosmic being known as Gah Lak Tus, and Heather’s many clones (which was revealed to be a small army of them) were designed to be the perfect lifeforms that would pave the way for Gah Lak Tus’ coming. While it is implied that Heather’s clones have psychic abilities–as one is able to pick up on a conversation from within a soundproof room–this version of the character is essentially just a highly-skilled assassin who was cloned into an army of highly-skilled assassins that were brainwashed by a cult into worshiping a world-eating space god.
The Ultimate Universe’s Moondragon is Much Easier to Adapt into the MCU
The origin of Earth-616’s Moondragon is way too tied-up in Thanos, Drax, and the Eternals to be viable to use for her eventual inclusion in the MCU, though her Ultimate Universe depiction could be the perfect way to get her foot in the door. The point of the Ultimate Universe was to re-imagine characters from the original comics in ways that were less convoluted and more streamlined, with more freedom to wildly change the stories of lesser-known characters like Moondragon (which is very similar to the current structure of the MCU). If the MCU used Moondragon’s Ultimate origin in some capacity, then it could perhaps follow the life of one of her clones that defected to the Avengers or Guardians of the Galaxy before unlocking her latent god-tier potential–thereby staying true to both 616 and 1610 origins without retconning previously established MCU characters.
Moondragon’s Ultimate Universe origin is more grounded in realism and doesn’t rely on any other character to be interesting, making it the perfect launching-off point for a new MCU character with limitless storytelling potential–proving that Marvel already showed the MCU how to debut a missing god-tier member of the Avengers.
