Avengers: Endgame - Everything That Foreshadowed Fat Thor's Transformation

screenrant.com:

Avengers: Endgame was the peak of the Marvel Cinematic Universe so far, bringing together all of this universe’s heroes to stop Thanos and his armies, but it also saw the original Avengers go through major changes, and one of the most surprising ones was Thor’s, who became Fat Thor – but looking back at his history in the MCU, his transformation wasn’t that surprising. For over a decade, the MCU has been bringing a variety of characters from Marvel Comics to the big screen, and among the first heroes to be introduced was the God of Thunder himself, Thor (Chris Hemsworth).

Thor made his MCU debut in 2011 in his first solo movie, simply titled Thor, directed by Kenneth Branagh. Thor returned the following year in The Avengers and later starred in his second solo adventure, Thor: The Dark World. Unfortunately, Thor 2 ended up being one of the weakest MCU movies and established Thor as one of the plainest characters in this universe, which didn’t change much during his appearance in Avengers: Age of Ultron – but his third solo movie, Thor: Ragnarok, made some very necessary changes to him. Under Taika Waititi’s direction, Thor was further developed and given a sense of humor, making his return in Avengers: Infinity War and Avengers: Endgame exciting ones, and allowing him to stay longer with Thor: Love and Thunder.

Related: Eternals Explains Why Thor Wasn't The Avengers' Leader

Thor went through another major change in Avengers: Endgame when he transformed into Fat Thor as a result of the depression he was going through. Five years after the snap that wiped out half of life in the universe, Thor was shown overweight and depressed in New Asgard, where even though he was king, he spent his time locked up in his house, drinking