It’s about (he) Who (remains) or who goes into the loom. Even though they had a variant it failed. So Loki is the one who needs to do it.
He who remains at the end is Loki. Using an illusion, blue skin could be a nod to frost giant lineage.
Mobius/Don - Donald Blake is Thor’s human counterpart so it could be a variant of him. Alternative Don could be a anagram of Odin if his last name starts with an I. Then he has one mischievous son (Loki) and another loves snakes (Thor).
OB/Orobouros. Created the TVA but now has created the original tempad too. His name is a snake eating its tail which is appropriate.
Either from a reset or from it all being a facade frok the beginning Loki is the one behind whole TVA.
A funko leak has announced God Loki on His Throne. That’s either gonna be a flashback in the next episode or the finale.