Warning: Spoilers for Doctor Strange In The Multiverse of Madness
Doctor Strange returns in Doctor Strange In the Multiverse of Madness to find a familiar face in Baron Mordo from another universe, but what has become of the Mordo in the original MCU? Stephen Strange and America Chavez travel from the Earth-616 universe (the main MCU) to the Earth-838 universe, attempting to escape the clutches of the Scarlet Witch. In this timeline, the two come across its current resident Sorcerer Supreme, Baron Karl Mordo. While in the Illuminati's confinement, Strange provokes Mordo-838 by appealing to the jealousy and hatred Mordo-616 has for Strange. The relationship dynamics between Mordo-838 and Strange-838 remain unclear. However, Mordo-838 does say that he is beginning to understand why Mordo-616 does not like Doctor Strange.
In the first Doctor Strange, Mordo and Strange's relationship began to strain after Mordo learned from Doctor Strange that the Ancient One used the Dark Arts in her magic. To make matters worse, Mordo disapproved of Stephen Strange's manipulation of time and violating the natural order, even if he was saving the world from Dormammu. As a result, Mordo chose another path away from what he learned in Kamar-Taj. Mordo's new motivation was to decrease the number of sorcerers in the world by stealing their magic power. Unfortunately, viewers haven't seen nor heard about Mordo-616 after his 2016 debut. Thus, the question remains regarding what Mordo has been up to since.
Related: Doctor Strange's Illuminati Members Explained: New Origins, Actors & Powers
Doctor Strange in the Multiverse of Madness makes a quick reference to Mordo-616 when Stephen Strange says that Mordo has dedicated his life to killing him.
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