Warning! Spoilers ahead for Eternals.
The events of Eternals support the idea that Thanos (Josh Brolin) did nothing wrong in Avengers: Infinity War. Marvel Studios had been teasing the existence of the Mad Titan in the MCU as early as the original Thor film. But despite a series of cameos since his first appearance in 2012's The Avengers, he wasn't properly debuted until Joe and Anthony Russo's Avengers: Infinity War in 2018.
Once the threat Thanos posed became imminent, the Avengers, Guardians
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