I still think the final reveal will be another Loki controlling everything.
I'm going with this as well. Loki finally ruling on the ultimate throne controlling all of time and its outcomes.
Then our Loki reaches them and realizes that even though it's all he's ever wanted, it's not right and he and Sylvie fight to demolish the TVA and bring it down. This then shows growth for our Loki as he discovers a deeper purpose and meaning for his life.
Maybe he and Sylvia return to the "prime" timeline and rejoin the Avengers or something.