This came to me earlier, I don't know if anyone has already thought of it:
It's known that the alternate version of Loki from AVENGERS: ENDGAME will be appearing in his own TV series soon. I was wondering how Loki managed to survive way back in THOR: THE DARK WORLD. What if Loki actually didn't survive, and really did die there? What if the Loki who went back to Asgard, took Odin's place, and appeared in THOR: RAGNAROK and AVENGERS: INFINITY WAR is actually the alternate Loki from ENDGAME who at some point finds himself back in the original timeline???