Tom Hilldeston's Loki makes a return in Avengers: Endgame, and sets up some potential problems thanks to his role. The god of mischief has become a fan-favorite character over the years in the Marvel Cinematic Universe, and much of this is thanks to Hiddleston's performance. He's gone from a jealous brother and hopeful ruler to a true ally to Thor. His heroic swing was his demise, as he died trying to kill Thanos in Avengers: Infinity War - and for failing the Mad Titan before.

The death comes just minutes into the film, with Thanos' "no resurrections this time" line used to convey that this death is legit, after Loki had faked his death a few times in the past. However, that isn't entirely true as far as Marvel Studios is concerned. They're developing a Loki miniseries for Disney+ that will see Hiddleston reprise the role. It was previously believed that this would be a prequel in some form due to his death, but Avengers: Endgame clearly sets up how this will be done.

Related: How Loki Sneakily Survived Avengers: Endgame

Loki reappears in the film thanks to time travel and the 2012 set scenes from The Avengers open up his return. Instead of being apprehended by the Avengers and taken to Asgard by Thor, Loki is able to get his hands on the Tesseract again and uses it to teleport away. This may be set up for his Disney+ series, but it also creates a potential problem for the MCU in Phase 4 and beyond. Check out the latest Screen Rant video featured at the top of this post to learn how.

Tom Hiddleston as Loki in The Avengers

The biggest problem that Loki's role in Avengers: Endgame brings the MCU is the idea of alternate timelines and that the Avengers' time travel did have some unintended and potentially costly consequences. There's now a reality where Loki wasn't caught and obtains the Space Stone for Thanos (or his own purposes), and where the Avengers' first major victory also has a major loose end. Unfortunately for the Avengers, this new timeline for Loki is just one of many branched realities that were created.

The other issue that has been raised for some is that Loki's role here and eventual return for Disney+ that's set up from it actually lessens the impact of his death in Avengers: Infinity War. There was a certain amount of finality that came with him dying before, but now that it's known he'll return in some form (even if it isn't this exact version of Loki) could have a negative reaction on the scene now. We'll have to wait and see how exactly Marvel Studios handles Loki in Phase 4 - and maybe beyond - and hopefully these concerns can be addressed in some fashion.

MORE: How Avengers: Endgame Sets Up ALL Confirmed Disney+ Shows

Key Release Dates