The Marvel Cinematic Universe is about to be besieged, not by one Kang the Conqueror, but countless versions of the villain! In today's blockbuster season finale of Loki, the God of Mischief and Sylvie learned that "He Who Remains" was the one responsible for the creation of the Time Variance Authority.
That was the only name he was given during the course of this episode, but we would soon come to learn that he is, in fact, Kang the Conqueror. Well, a version of him.
You see, in the 31st Century, a Variant of his discovered the existence of the Multiverse, as did his alternate-reality counterparts. While they initially worked together to improve their respective worlds, some Variants wanted to rule, and a war followed with all of reality at stake (we even see the Kangs decked out in their comic accurate costumes while fighting each other).
This Kang, "He Who Remains," eventually discovered Alioth and used him to destroy the others before creating the TVA in an effort to stop another Multiversal war from ever breaking out again. He's been successful up until now, but after Sylvie kills him, all those alternate realities are reborn, and the villainous Kangs are free to once again attempt to conquer everything.
Oh, as for which version of Kang we'd be willing to bet this was, based on his costume and comments about being much older than he looks, it's almost certainly Immortus.
What did you guys think about Loki's big bad reveal?