Loki's He Who Remains wasn't always a Kang the Conqueror variant, but this change has actually given the MCU its best possible Thanos replacement. Throughout Phase 4, Marvel has been seemingly lacking the central story and focus provided by the Mad Titan and his quest for the Infinity Stones. However, by subtly shifting the origins of Loki's ultimate arbiter, the MCU has finally set up what could be its next epic storyline.
He Who Remains did not appear until the Loki finale, yet his impact in many ways defined the series. Played by Jonathan Majors, it was revealed that the mysterious being was one of innumerable variants – including Kang the Conqueror – who fought against one another in a multiversal war of conquest. In order to prevent the spread of chaos and restore order, He Who Remains weaponized the entity Alioth, established the Time Variance Authority and vowed to guard the MCU's Sacred Timeline. However, despite warning of what could come in his absence, He Who Remains was killed by Sylvie, tearing apart the established order and paving the way for a new era of multiversal conflict.
Related: The Russos Are Wrong — Loki Didn't Deserve To Die
Majors' Loki character subtly differed from his comic counterpart. In the source material, He Who Remains is an alien being, unconnected to Kang the Conqueror, yet still responsible for the establishment of the TVA. However, by directly linking the two, the MCU effectively set up its next villain, without the need for potentially unnecessary and convoluted exposition. The knowledge that Majors is Kang, and his brief explanation of the danger posed by He Who Remains' variants established the stakes involved in breaking the MCU's multiverse, both for Loki and Sylvie and other
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