Theory: Loki is paving the way for Doom
Title. Just like with He Who Remains, we will meet our Loki presumably after eons of holding the time throne. At some point Loki realized the current structure he’s maintaining still suppresses or erases large-scale mutant existence across most of time.
He engineers one specific confrontation with Doom (who is the only other being strong enough to allow mutants) knowing Doom will seize the position. I believe this was our Loki’s only option just like with He Who Remains. Loki steps aside or lets himself be overwritten so a new order can form; one that includes mutants as a permanent feature.
That’s my theory, I’ll be back in four months.