Of all of the characters who died in Avengers: Infinity War, the one that the majority of the internet won’t let go is Loki.
Now, the Russos have said that the deaths in Infinity War are real. And that definitely is the case. They’re real in the timeline that they happened. But with time travel…things can change.
The big rumors of Avengers 4 say that time travel will play a huge part. Via the Quantum Realm (from the Ant-Man movies), Tony Stark and the surviving Avengers will apparently travel through time to find the Infinity Stones before Thanos is able to. Through those actions, timelines will be changed.
Loki was killed very recently in the current MCU timeline, when Thanos attacked the Asgardian ship looking for the Tesseract. Now, if Avengers 4 changes the timeline and the Tesseract never goes to Asgard following the events of the first Avengers movie, that would mean that Loki would not be on that ship and not be killed by Thanos when he gets the Space Stone.
It’s just a theory based on the time travel rumors for Avengers 4, but it’s something to give the Loki Army hope that their hero could live on in the MCU in some way…